Chemical Symbols & Formulas

Size: px
Start display at page:

Download "Chemical Symbols & Formulas"

Transcription

1 + Chemical Symbols & Formulas

2 + Chemical Symbols All elements in the Periodic Table have symbols that are recognized world wide. It does not matter which country you are in or the language you speak. Example: The element Iron is always identified by Fe and Oxygen is O. The names are not always the same but the symbols are. Fe is iron in Canada, fer in France and fier in Romania.

3 Chemical Symbols A Chemical symbol is an abbreviation of the name of an element. EX: Nitrogen s symbol is N Element Oxygen Nitrogen Hydrogen Sodium Chemical Symbol O N H Na Capital letter if only one letter. Only first letter capital if more than one letter. Second letter of a symbol is never capitalized.

4 + Compounds Two or more atoms bonded together with two or more elements To Identify the elements in a compound we must: Look at the periodic table Compare the letters in the compound to the Periodic table Capital letters mean a new element Lowercase letters go with the capital letter before it Na Cl H F Ne Where do we divide the following? NaFNe

5 + Making Compounds When two of different elements share electrons they form a bond Na Na Cl Cl We then see Sodium Chloride (NaCl)

6 + Molecules Two or more atoms (can be the same or different element) bonded together

7 +

8

9 How would you vote? Would you vote to ban the compound Dihydrogen Monoxide from our school? Here are some of the things it does: Can cause excessive sweating and vomiting Is a major component in acid rain Can cause sever burns in gaseous state Accidental inhalation can kill you It contributes to acid rain It decreases the effectiveness of automobile brakes It has been found in tumors of terminal cancer patients

10 Chemical Formulas A chemical formula is the combination of symbols that represent a particular compound. The chemical formula indicates which elements are present in the compound and how many atoms of that element are present. Ex. 1: Water molecule H 2 O: 2 atoms of hydrogen, 1 atom of oxygen Ex. 2: Sugar molecule C 6 H 12 O 6 : 6 atoms of carbon, 6 atoms of oxygen, 12 molecules of hydrogen

11 Subscripts: Written at lower right corner behind the symbol of an element Subscripts only refer to the atom that they are BEHIND. Indicates number of atoms for each element in a compound. No subscript means there is only one atom of that element. H 2 O

12 + C O 2 Look at your periodic table. What are the two elements we see in the compound above? How many of each element are used to form Carbon Dioxide? How many atoms, how many elements?

13 + H O 2 What is this compound called? What elements bond to form it? How many of each element are there? How many atoms, how many elements?

14 + HCl Where do we divide the elements in the molecule? What are the elements? What might this be called? How many atoms, how many elements?

15 + Mg Cl 2 What are the elements in this molecule? How many of each element are there? What do you think the name of the element might be? How many atoms, how many elements? Pause B4 Next slide

16 + Chemical Formulas - Examples How many atoms, how many elements? Calcium Carbonate (chalk) CaCO 3 1 Calcium atom, 1 Carbon atom, and 3 oxygen atoms Sodium Chloride (salt) NaCl 1 Sodium atom, 1 Chlorine atom Acetysalicylic acid (aspirin) C 9 H 4 O 8 9 Carbon atoms, 4 Hydrogen atoms, 8 Oxygen atoms Acetic acid (vinegar) C 2 H 4 O 2 2 Carbon atoms, 4 Hydrogen atoms, and 2 Oxygen atoms

17 + Write the following down for reference. Write how many atoms, and how many elements for future reference.

18 Coefficients A number written in front of a chemical formula that indicates the amount of molecules. 3NaCl = NaCl + NaCl + NaCl = 3 Sodium, 3 Chlorine Coefficients apply to the entire chemical formula. You multiple the coefficient AND subscript. 2Al 2 S 3 = Al 2 S 3 + Al 2 S 3 = 4 Aluminum, 6 Sulfur

19 + Write the following down for reference. 3H 2 SO 4

20 Parentheses If elements or molecules are inside of PARENTHESES, then the SUBSCRIPT behind the parentheses applies to everything inside. Ba(OH) 2 = Ba + OH + OH = 1 Barium, 2 hydroxide molecules = 1 Barium, 2 Oxygen, 2 hydrogen

21 + Chemical Reactions & Equations (LT-13) Recognize evidence of a chemical reaction. (LT-14 Recognize that after a chemical reaction takes place, the new substance has new properties different from the original substance. (LT-15) Recognize what a chemical equation is and whether it is balanced or unbalanced. (LT-16) Relate the Law of Conservation of Mass with chemical equations.

22 Chemical Reactions The process by which one or more substances change to produce one or more new and different substances. Bonds in compounds get broken or form together in a chemical reaction.

23 Chemical Equations Chemical equations are used as a shorthand description of a chemical reaction. A Chemical Equation MUST: Have the same number and type of atoms on each side of the yield sign. Have bonds that are broken and/or new bonds which are formed. Charcoal is used to cook food on a barbecue. When the carbon in charcoal reacts with oxygen in the air, the primary product is carbon dioxide Write the following example down of what a chemical equation looks like. C + O2 CO2 Reactants Yields Products

24 + Vocabulary Reactants = Everything on the left side of the arrow Yields = The arrow means a reaction has occurred (to produce, produces, to form, forms, yields, gives) Plus Sign = Use a +sign to represent and, plus, reacts with, added to, combines, mixes Products = Everything on the right side of the arrow REACTANTS + REACTANTS PRODUCTS + PRODUCTS

25 Different types of Reactions (and their equations) Yes you need to write this down. Type What is happening Example A+B AB (Synthesis) AB A+B (Decomposition) A+BC AC + B or (Displacement) AB+CD AC+ BD Two or more elements combine to form a new compound A compound breaks down into elements or smaller compounds Elements/compounds rearrange to form new compounds Fe+ S FeS 2 H 2 O 2 H 2 + O 2 HBr + NaOH ---> NaBr + H 2 O

26 + Balancing Chemical Equations Coefficients used to balance chemical equations. # placed in front of a chemical symbol or formula in an equation to balance the equation and follow the law of conservation of mass. SUBSCRIPTS ARE NEVER CHANGED!!!! Chemical Equations show how many atoms or molecules are reacting or formed in the equation. Ex: 4 sodium atoms combine with 2 oxygen atoms to form 2 molecules of sodium oxide. Write the following equation down and count the atoms on the reactants side and the product side. 4Na + O 2 2Na 2 O

27 + Balanced or unbalanced? To determine whether or not an equation is balanced, count the atoms for each element on the product and reactant sides of the equation. They must be equal Balanced Unbalanced Cu + O2 ----> Cu2O 2Mg + O 2 2MgO Elements Reactants Products Elements Reactants Products Mg 2 2 O 2 2 Cu 1 2 O 2 1

28 + Law of Conservation of Mass (COM) The mass of atoms and molecules is neither created or destroyed in chemical reactions. The # of atoms in the reactants must equal the # of atoms in the products in a chemical reaction.

29 Law of Conservation of Energy Law of Conservation of Energy -states that energy can be neither created or destroyed in a chemical reaction. Chemical Reactions can be: Exothermic-energy is released (feels warm) exo -out of therm - heat OR Endothermic-energy is absorbed (feels cold) endo -into

30 + Law of Conservation of Energy / Mass Chemical Equations must be balanced to represent no new element was created or an element destroyed. 6CO 2 + 6H 2 O + Light Energy = C 6 H 12 O 6 + 6O 2

31 + Rates of Reactions How quickly chemical reactions take place. 4 factors affect the rate of reaction. Temperature Concentration Surface area Catalysts and Inhibitors

32 + Temperature Higher temperatures produce faster rates of reaction. Particles of the reactants are moving faster and collide more often with more energy.

33 + Concentration Concentration - a measure of the amount of one substance dissolved in another. Higher concentrations of reactants = faster rate of reactions

34 + Catalysts and Inhibitors Catalyst - substance that speeds up a reaction. Lowers the activation energy of a reaction allowing the reaction to happen more quickly. Example - Enzymes in the body Inhibitor - substance that slows down or stops a chemical reaction. Example - Preservatives added to foods

35 + Surface Area Surface area - the amount of exposed surface of a substance. Greater surface area of reactants = faster rate of reaction.

36 +

Chemical Reactions. Section 7.1: Nature of Reactions

Chemical Reactions. Section 7.1: Nature of Reactions Chemical Reactions Section 7.1: Nature of Reactions When do chemical reactions take place? What is the role of energy in chemical reactions? 1 Chemical Reactions It is a change in matter that produces

More information

CHAPTER 8 CHEMICAL REACTIONS AND EQUATIONS

CHAPTER 8 CHEMICAL REACTIONS AND EQUATIONS CHAPTER 8 CHEMICAL REACTIONS AND EQUATIONS CHEMICAL REACTIONS Occurs when matter combines or breaks apart to produce new kinds of matter with different properties with a change in energy. EVIDENCE FOR

More information

Section 1 Chemical Changes

Section 1 Chemical Changes Chemical Reactions Section 1 Chemical Changes What You ll Learn: How to identify the reactants & products in a chemical reaction How a chemical reaction follows the law of conservation of mass How chemists

More information

Chemical formula - tells you how many atoms of each element are in a compound example: CO 2 (carbon dioxide) has one carbon atom and two oxygen atoms

Chemical formula - tells you how many atoms of each element are in a compound example: CO 2 (carbon dioxide) has one carbon atom and two oxygen atoms Chemical Reactions Chemical formula - tells you how many atoms of each element are in a compound example: CO 2 (carbon dioxide) has one carbon atom and two oxygen atoms 2 points Chemical Equation - a short,

More information

Balancing CHEMICAL EQUATIONS

Balancing CHEMICAL EQUATIONS Balancing CHEMICAL EQUATIONS CHEMICAL REACTIONS involves a chemical change in the identity of one or more chemical species Ex. Rusting of iron (Fe): chemical rxn btwn water and iron involve the breaking

More information

CHEMICAL REACTIONS. Types of Reactions. Steps to Writing Reactions

CHEMICAL REACTIONS. Types of Reactions. Steps to Writing Reactions Types of Reactions CHEMICAL REACTIONS There are five types of chemical reactions we will talk about: 1. Synthesis reactions 2. reactions 3. Single displacement reactions 4. reactions 5. Combustion reactions

More information

Chemical Reactions Chapter 2 L book pages L44 - L73. examples?

Chemical Reactions Chapter 2 L book pages L44 - L73. examples? Name: Period: Chemical Reactions Chapter 2 L book pages L44 - L73 Vocabulary Word What is this? (definition) What are some examples? What does it look like? (draw a picture or diagram) Physical property

More information

4 Energy and Rates of Chemical Reactions

4 Energy and Rates of Chemical Reactions CHAPTER 14 4 and Rates of Chemical Reactions SECTION Chemical Reactions BEFORE YOU READ After you read this section, you should be able to answer these questions: How is energy involved in a chemical reaction?

More information

Chemical Reactions Chapter 17

Chemical Reactions Chapter 17 Chemical Reactions Chapter 17 I. Physical Change Changes which affect the size or shape of the substance BUT NOT its chemical properties or formulas. e.g.; ice melting. Water is still water II. Chemical

More information

Chemical Reactions. Chemical changes are occurring around us all the time

Chemical Reactions. Chemical changes are occurring around us all the time Chemical changes are occurring around us all the time Food cooking Fuel being burned in a car s engine Oxygen being used in the human body The starting materials are called reactants The ending materials

More information

CHEMICAL REACTIONS. Discuss breaking/forming bonds 10/29/2012. Products Reactants

CHEMICAL REACTIONS. Discuss breaking/forming bonds 10/29/2012. Products Reactants CHEMICAL REACTIONS - Page 321 Products Reactants Reactants: Zn + I 2 Product: Zn I 2 Discuss breaking/forming bonds Chemical Reaction or Change process in which one or more substances are converted into

More information

Chapter 14 Study Questions Name: Sci Class:

Chapter 14 Study Questions Name: Sci Class: Chapter 14 Study Questions Name: Sci Class: Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. 1. Balancing a chemical equation so that the same

More information

What does rate of reaction mean?

What does rate of reaction mean? Junior Science What does rate of reaction mean? It is not how much of a product is made, but instead how quickly a reaction takes place. The speed of a reaction is called the rate of the reaction. What

More information

Describing Chemical Reactions

Describing Chemical Reactions Name Date Class Chemical Reactions Guided Reading and Study Describing Chemical Reactions This section explains how to show chemical reactions with symbols. It also states the principle of conservation

More information

Chapter Introduction Lesson 1 Understanding Chemical Reactions Lesson 2 Types of Chemical Reactions Lesson 3 Energy Changes and Chemical Reactions

Chapter Introduction Lesson 1 Understanding Chemical Reactions Lesson 2 Types of Chemical Reactions Lesson 3 Energy Changes and Chemical Reactions Chapter Introduction Lesson 1 Understanding Chemical Reactions Lesson 2 Types of Chemical Reactions Lesson 3 Energy Changes and Chemical Reactions Chapter Wrap-Up Changes in Matter A physical change does

More information

Balancing Equations. Chemical reactions occur when bonds (between the electrons of atoms) are formed or broken Chemical reactions involve

Balancing Equations. Chemical reactions occur when bonds (between the electrons of atoms) are formed or broken Chemical reactions involve Balancing Equations Chemical reactions occur when bonds (between the electrons of atoms) are formed or broken Chemical reactions involve changes in the chemical composition of matter the making of new

More information

Understanding Equations

Understanding Equations Chemical Reactions Chemical reaction: a process of chemically changing both the physical and chemical properties of a substance to a new substance with different physical and chemical properties. Video

More information

Indicators of chemical reactions

Indicators of chemical reactions Indicators of chemical reactions Emission of light or heat Formation of a gas Formation of a precipitate Color change Emission of odor All chemical reactions: have two parts Reactants - the substances

More information

Chapter 6 and 7 Study Guide Reactions and Bonds

Chapter 6 and 7 Study Guide Reactions and Bonds Name_ Per. Block _ Multiple Choice: Chapter 6 and 7 Study Guide Reactions and Bonds 1. Copper is a good conductor of electricity because its electrons A. are positively charged B. are free to move and

More information

Chapter 7 Chemical Reactions

Chapter 7 Chemical Reactions Chapter 7 Chemical Reactions Chemical Equation --> is a representation of a chemical reaction in which the reactants and products are expressed as formulas Reactants --> substances that undergo change

More information

Physical or Chemical Change?

Physical or Chemical Change? Chemical Formulas and Equations Physical or Chemical Change? Matter can change physically or chemically; a process that produces a chemical change is a chemical reaction. Chemical Formulas and Equations

More information

2 Chemical Formulas and Equations

2 Chemical Formulas and Equations CHAPTER 14 2 Chemical Formulas and Equations SECTIN Chemical Reactions BEFRE YU READ After you read this section, you should be able to answer these questions: What are chemical formulas? What are chemical

More information

Chemical reactions. C2- Topic 5

Chemical reactions. C2- Topic 5 Chemical reactions C2- Topic 5 What is a chemical reaction? A chemical reaction is a change that takes place when one or more substances (called reactants) form one or more new substances (called products)

More information

Chemical Bonds & Reactions

Chemical Bonds & Reactions Chemical Bonds & Reactions Chemical Bonding Do you understand how it works? What do you think when I pull out a bag of candy? I want that candy cause I don t have any! Does everyone think the same thing?

More information

C2.6 Quantitative Chemistry Foundation

C2.6 Quantitative Chemistry Foundation C2.6 Quantitative Chemistry Foundation 1. Relative masses Use the periodic table to find the relative masses of the elements below. (Hint: The top number in each element box) Hydrogen Carbon Nitrogen Oxygen

More information

Describing Chemical Reactions

Describing Chemical Reactions Describing Chemical Reactions This section explains how to show chemical reactions with symbols. It also states the principle of conservation of mass, and identifies three categories of chemical reactions.

More information

Chemical Formulas and Equations

Chemical Formulas and Equations Chemical Formulas and Equations 8.5D recognize that chemical formulas are used to identify substances and determine the number of atoms of each element in chemical formulas containing substances; 8.5F

More information

Physical Change - alters the form or appearance of a substance but does not change it into a new, different substance

Physical Change - alters the form or appearance of a substance but does not change it into a new, different substance Chemical Reactions Physical Change - alters the form or appearance of a substance but does not change it into a new, different substance Chemical Change - forms one or more new substances with properties

More information

Lesson #6: Chemical Reaction Types

Lesson #6: Chemical Reaction Types Lesson #6: Chemical Types Type #1 The Synthesis In this type of reaction 2 or more elements or compounds combine to form a more complex compound Two or more things become one bigger thing (ex) 2Mg + O

More information

Unit 5: Chemical Reactions. Chapter 11

Unit 5: Chemical Reactions. Chapter 11 Unit 5: Chemical Reactions Chapter 11 Objectives 35 Identify the five types of chemical reactions 36 Write word and chemical equations based on chemical reactions 37 Balance chemical equations 38 Predict

More information

Section 1 Chemical Changes

Section 1 Chemical Changes Chemical Reactions Chemical Reactions Section1 Chemical Reactions slides 3-20 Section 2 Chemical Equations slides 21-34 Section 3 Classifying Chemical Reactions slides 35-46 Sections 4 Chemical Reactions

More information

Part 01 - Notes: Reactions & Classification

Part 01 - Notes: Reactions & Classification Objectives: Identify, define, and explain: combination reaction, synthesis reaction, decomposition reaction, single replacement reaction, double replacement reaction, combustion reaction, rapid oxidation,

More information

Chapter 9 Practice Test

Chapter 9 Practice Test Chapter 9 Practice Test Multiple Choice Identify the choice that best completes the statement or answers the question. 1) Which of the following describes a chemical reaction? a) A gas is given off when

More information

ELEMENTS, COMPOUNDS AND MIXTURES AND HOW THEY ARE REPRESENTED. Jan 12-13, 2014

ELEMENTS, COMPOUNDS AND MIXTURES AND HOW THEY ARE REPRESENTED. Jan 12-13, 2014 ELEMENTS, COMPOUNDS AND MIXTURES AND HOW THEY ARE REPRESENTED Jan 12-13, 2014 WHAT ARE ELEMENTS? Elements are pure substances Made of only one kind of material Has definite properties, and Is the same

More information

Science 1206 Chemistry Unit #11

Science 1206 Chemistry Unit #11 Science 1206 Chemistry Unit #11 Types of Chemical Reactions Types of Chemical Reactions Five types of chemical reactions: Formation (synthesis) Decomposition Single Displacement Double Displacement Combustion

More information

Chemical Equations. Physical Science

Chemical Equations. Physical Science Chemical Equations Physical Science Chemical Equations A chemical equation is a shorthand way of expressing a chemical reaction. CHEMICAL REACTIONS Reactants: Zn + I 2 Product: Zn I 2 Chemical reactions

More information

Representing Chemical Change

Representing Chemical Change Representing Chemical Change As we have already mentioned, a number of changes can occur when elements react with one another. These changes may either be physical or chemical. One way of representing

More information

2) Solve for protons neutrons and electrons for the bromide ION.

2) Solve for protons neutrons and electrons for the bromide ION. 1) Write the formulas for the following a) Calcium nitride c)lithium hydroxide b) Iron (III) sulfide d) sulfuric acid 2) Solve for protons neutrons and electrons for the bromide ION. 3) Write the electron

More information

Moles. Balanced chemical equations Molar ratios Mass Composition Empirical and Molecular Mass Predicting Quantities

Moles. Balanced chemical equations Molar ratios Mass Composition Empirical and Molecular Mass Predicting Quantities Moles Balanced chemical equations Molar ratios Mass Composition Empirical and Molecular Mass Predicting Quantities Micro World atoms & molecules Macro World grams Atomic mass is the mass of an atom in

More information

Intro to Reactions/ Balancing Equations

Intro to Reactions/ Balancing Equations Intro to Reactions/ Balancing Equations Chemical Reactions Chemical reactions involve change. Evidence of a chemical reaction could include the following Evolution of heat, light, and/or sound Production

More information

Chemical Bonds And Equations

Chemical Bonds And Equations Chemical Bonds And Equations Intro to Chemical Bonds EQ: Why do atoms have a strong desire to form chemical bonds in nature? What are these called when different types of atoms bond to form a chemically

More information

CHAPTER 1: CHEMICAL REACTIONS

CHAPTER 1: CHEMICAL REACTIONS CHAPTER 1: CHEMICAL REACTIONS Section 1: Forming New Substances Chemical Changes are responsible for leaf coloring Chemical Reactions Process of one or more substance undergoes change to produce one or

More information

Chemical Bonds & Reactions

Chemical Bonds & Reactions Chemical Bonds & Reactions Chemical Bond A force of attraction that holds two atoms together Involves the valence electrons (they determine the chemical characteristics of the atom!) Valence Electrons

More information

Identify the reaction type, predict the products, and balance the equations. If it is a special decomposition or synthesis, identify which kind.

Identify the reaction type, predict the products, and balance the equations. If it is a special decomposition or synthesis, identify which kind. Identify the reaction type, predict the products, and balance the equations. If it is a special decomposition or synthesis, identify which kind. 1. calcium + oxygen 2. cupric carbonate 3. aluminum + hydrochloric

More information

11-1 Notes. Chemical Reactions

11-1 Notes. Chemical Reactions 11-1 Notes Chemical Reactions Chemical Reactions In a chemical reaction 1 or more substances (the reactants) change into 1 or more new substances (the products). Reactants are always written on the left

More information

Student Exploration: Chemical Changes

Student Exploration: Chemical Changes Name: Date: Student Exploration: Chemical Changes Vocabulary: acid, base, catalyst, chemical change, coefficient, conservation of matter, decomposition, dissolve, double replacement, endothermic, exothermic,

More information

C2.6 Quantitative Chemistry Foundation

C2.6 Quantitative Chemistry Foundation C2.6 Quantitative Chemistry Foundation 1. Relative masses Use the periodic table to find the relative masses of the elements below. (Hint: The top number in each element box) Hydrogen Carbon Nitrogen Oxygen

More information

(DO NOT WRITE ON THIS TEST)

(DO NOT WRITE ON THIS TEST) Final Prep Chap 8&9 (DO NOT WRITE ON THIS TEST) Multiple Choice Identify the choice that best completes the statement or answers the question. 1. After the correct formula for a reactant in an equation

More information

Unit 5: Diversity of Matter

Unit 5: Diversity of Matter 21 21 Table of Contents Unit 5: Diversity of Matter Chapter 21: Chemical Reactions 21.1: Chemical Changes 21.2: Chemical Equations 21.3: Classifying Chemical Reactions 21.4: Chemical Reactions and Energy

More information

7.1 Describing Reactions

7.1 Describing Reactions Chapter 7 Chemical Reactions 7.1 Describing Reactions Chemical Equations Equation states what a reaction starts with, and what it ends with. Reactants the starting materials that undergo change. (On the

More information

Jeddah Knowledge International School

Jeddah Knowledge International School Jeddah Knowledge International School Science Revision Pack 2016-2017 Quarter 1 Grade 9 Name: Section: Science Revision Pack Grade Nine Quarter One Page 1 Revision Pack Grade 9 Chemistry Question 1: Circle

More information

Test Review Unit 3_2 Chemical reactions. Fundamentals Identify the letter of the choice that best completes the statement or answers the question.

Test Review Unit 3_2 Chemical reactions. Fundamentals Identify the letter of the choice that best completes the statement or answers the question. Test Review Unit 3_2 Chemical reactions. Fundamentals Identify the letter of the choice that best completes the statement or answers the question. 1. Which of the following are chemical changes: a) Sugar

More information

Science. Reactions and compounds. Chemical reactions

Science. Reactions and compounds. Chemical reactions Science Chemical reactions When elements react, their atoms join with other atoms to form compounds [compound: A compound is a substance formed by the chemical union (involving bond formation) of two or

More information

Introduction to Chemical Reactions. Making new substances

Introduction to Chemical Reactions. Making new substances Introduction to Chemical Reactions Making new substances Main Ideas Chemical Reactions are represented by Chemical Equations. Chemical Equations are balanced to show the same number of atoms of each element

More information

CHEMICAL REACTIONS. Introduction. Chemical Equations

CHEMICAL REACTIONS. Introduction. Chemical Equations CHEMICAL REACTIONS Chemistry I Chapter 7 1 Chemical Equations Their Job: Depict the kind of reactants and products and their relative amounts in a reaction. 4 Al (s) + 3 O 2 (g) ---> 2 Al 2 O 3 (s) The

More information

Physical Change - alters the form or appearance of a substance but does not change it into a new, different substance

Physical Change - alters the form or appearance of a substance but does not change it into a new, different substance Chemical Reactions Physical Change - alters the form or appearance of a substance but does not change it into a new, different substance Chemical Change (aka chemical reaction) - forms one or more new

More information

Chemical Reactions. A. Chemical Reactions And The Law Of Conservation Of Mass

Chemical Reactions. A. Chemical Reactions And The Law Of Conservation Of Mass Chemical Reactions A. Chemical Reactions And The Law Of Conservation Of Mass 1. A CHEMICAL REACTION is a change that produces new materials with different properties from the starting materials. Various

More information

Chemical Reactions and Equations

Chemical Reactions and Equations Name Date Chemical Reactions and Equations What happens to atoms and energy during a chemical reaction? Before You Read Before you read the chapter, think about what you know about chemical reactions Record

More information

Chemical Reactions. Unit 4

Chemical Reactions. Unit 4 Chemical Reactions Unit 4 Lesson 1: Chemical Bonds Unit 4: Reactions Compounds Most substances around you are NOT elements. There are around 100 elements, but millions of different substances. Most substances

More information

Balancing Hydrocarbons

Balancing Hydrocarbons Balancing Equations a. Add coefficients to make atoms the same on both sides b. Must balance Metals first, then Nonmetals, followed by Hydrogen, and Oxygen last ( met nine hairy oxen ) c. Adjust totals

More information

Choose the answer that best completes each statement.

Choose the answer that best completes each statement. Name Date CHAPTER TEST: CHEMICAL BONDS AND EQUATIONS Multiple Choice Choose the answer that best completes each statement. 1. Magnesium bromide is an ionic compound with the chemical formula MgBr2. What

More information

Unit IV: Chemical Equations & Stoichiometry

Unit IV: Chemical Equations & Stoichiometry Unit IV: Chemical Equations & Stoichiometry A. The chemical equation B. Types of chemical reactions A. Activity series of metals B. Solubility rules C. Rules for writing and balancing equations D. Calculations

More information

The photograph in the textbook provides evidence that an exothermic chemical reaction is occurring.

The photograph in the textbook provides evidence that an exothermic chemical reaction is occurring. Preview Lesson Starter Objectives Indications of a Chemical Reaction Characteristics of Chemical Equations Significance of a Chemical Equation Balancing Chemical Equations Section 1 Describing Chemical

More information

1. Parts of Chemical Reactions. 2 H 2 (g) + O 2 (g) 2 H 2 O(g) How to read a chemical equation

1. Parts of Chemical Reactions. 2 H 2 (g) + O 2 (g) 2 H 2 O(g) How to read a chemical equation Unit 6 Chemical Reactions 1. Parts of a Chemical Reaction 2. Indicators of a Chemical Reaction 3. Enthalpy 4. Balancing Chemical Equations 5. Word Equations 6. Classifying Chemical Reactions 7. Predicting

More information

Chem 11 UNIT 3: STOICHIOMETRY Name:

Chem 11 UNIT 3: STOICHIOMETRY Name: Chem 11 UNIT 3: STOICHIOMETRY Name: Ms. Pirvu Period: Writing & Balancing Equations Chemical reactions can be described by chemical equations. Recall Law of Conservation of Mass mass cannot be nor. This

More information

8 Chemical Equations. Flames and sparks result when aluminum foil is dropped into liquid bromine.

8 Chemical Equations. Flames and sparks result when aluminum foil is dropped into liquid bromine. 8 Chemical Equations Flames and sparks result when aluminum foil is dropped into liquid bromine. Chapter Outline 8.1 The Chemical Equation 8.2 Writing and Balancing Chemical Equations 8.3 Types of Chemical

More information

Lesson 01 and 02: Introduction to Chemical Reaction Equations. 01 Chemical Reactions

Lesson 01 and 02: Introduction to Chemical Reaction Equations. 01 Chemical Reactions Chemistry 11, Chemical Reactions, Unit 05 1 Lesson 01 and 02: Introduction to Chemical Reaction Equations 01 Chemical Reactions A chemical reaction is a process by which one or more substances may be transformed

More information

Ionic Covalent Metallic

Ionic Covalent Metallic 3 Types of Chemical Bonds Ionic Covalent Metallic What can you describe about each of these bonds just by looking at the name? Chemical Bonds & Reactions Chemical Bond A force of attraction that holds

More information

Gizmo: Balancing Chemical Equations

Gizmo: Balancing Chemical Equations Name: Date: Gizmo: Balancing Chemical Equations Part A: Prior Knowledge Questions (Do these BEFORE using the Gizmo.) The scouts are making s mores out of toasted marshmallows, chocolate, and graham crackers.

More information

2. Indicators of Chemical Rxns. Abbreviations of State (g) gas (l) liquid (s) solid (aq) aqueous a substance dissolved in water

2. Indicators of Chemical Rxns. Abbreviations of State (g) gas (l) liquid (s) solid (aq) aqueous a substance dissolved in water Unit 6 Chemical Reactions 1. Parts of a Chemical Reaction 2. Indicators of a Chemical Reaction 3. Enthalpy 4. Balancing Chemical Equations 5. Word Equations 6. Classifying Chemical Reactions 7. Predicting

More information

Name Honors Chemistry / / Chemical Equations Reactions

Name Honors Chemistry / / Chemical Equations Reactions Name Honors Chemistry / / Chemical Equations Reactions Like everything else in chemistry, chemical equations follow a few basic patterns. Today we will begin to look at the first of these patterns and

More information

Chemical Reactions. Chemical Reactions Chemical reactions have a standard format when written:

Chemical Reactions. Chemical Reactions Chemical reactions have a standard format when written: 0.3.notebook A chemical property is a behaviour that occurs when substances change to create a new substance. When a new substance is created, a chemical change has occurred. New colour Evidence of chemical

More information

Chemical Bonds & Reactions

Chemical Bonds & Reactions Chemical Bonds & Reactions Chemical Bond A force of attraction that holds two atoms together Has a significant effect on chemical and physical properties of compounds involves the valence electrons Valence

More information

Modeling Conservation of Mass

Modeling Conservation of Mass How is mass conserved (protected from loss)? Imagine an evening campfire. As the wood burns, you notice that the logs have become a small pile of ashes. What happened? Was the wood destroyed by the fire?

More information

Chapter 7. Chemical Equations and Reactions

Chapter 7. Chemical Equations and Reactions Chemical Equations and Reactions Chemical and Physical Changes In a physical change, the chemical composition of the substance remains constant. Examples of physical changes are the melting of ice or the

More information

Notes: Balancing Chemical Equations

Notes: Balancing Chemical Equations Notes: Balancing Chemical Equations Effects of chemical reactions: Chemical reactions rearrange atoms in the reactants to form new products. The identities and properties of the products are completely

More information

Which of the following is NOT an example of a chemical reaction? A. Milk turning sour B. Food being digested C. A match burning D.

Which of the following is NOT an example of a chemical reaction? A. Milk turning sour B. Food being digested C. A match burning D. Chemical Reactions Which of the following is NOT an example of a chemical reaction? A. Milk turning sour B. Food being digested C. A match burning D. Ice melting Which of the following is NOT an example

More information

Chem A Ch. 9 Practice Test

Chem A Ch. 9 Practice Test Name: Class: Date: Chem A Ch. 9 Practice Test Matching Match each item with the correct statement below. a. product d. balanced equation b. reactant e. skeleton equation c. chemical equation 1. a new substance

More information

Chemical Reactions. Chapter Test A. Multiple Choice. 1 Pearson Education, Inc., or its affiliates. All rights reserved.

Chemical Reactions. Chapter Test A. Multiple Choice. 1 Pearson Education, Inc., or its affiliates. All rights reserved. Name Date Class Chemical Reactions Chapter Test A Multiple Choice Write the letter of the correct answer on the line at the left. 1. Chemistry is a. a characteristic of a substance that can be observed

More information

Chapter 11. Symbols used in equations indicates a reversible reaction (More later) heat. Chemical Reactions

Chapter 11. Symbols used in equations indicates a reversible reaction (More later) heat. Chemical Reactions Chapter 11 Chemical Reactions All chemical reactions have two parts Reactants - the substances you start with Products- the substances you end up with The reactants turn into the products. Reactants Products

More information

Honors text: Ch 10 & 12 Unit 06 Notes: Balancing Chemical Equations

Honors text: Ch 10 & 12 Unit 06 Notes: Balancing Chemical Equations Notes: Balancing Chemical Equations Effects of chemical reactions: Chemical reactions rearrange atoms in the reactants to form new products. The identities and properties of the products are completely

More information

Observing Chemical Change - 5.1

Observing Chemical Change - 5.1 Observing Chemical Change - 5.1 Vocabulary: Physical change - Chemical change - Reactant Product Precipitate Exothermic reaction - Endothermic reaction - Properties of matter: Two kinds of properties of

More information

Balancing Equations Notes

Balancing Equations Notes . Unit 9 Chemical Equations and Reactions What is a Chemical Equation? A Chemical Equation is a written representation of the process that occurs in a chemical reaction. A chemical equation is written

More information

Science 1206 Unit 3: Chemical Reactions Page 1 of 15

Science 1206 Unit 3: Chemical Reactions Page 1 of 15 Science 1206 Unit 3: Chemical Reactions Page 1 of 15 Introduction to Chemical Reactions Notes Part II TEXT p. 218-219 (word equations) There are many chemical reactions too many to count in fact! Like

More information

Section 1: What is a Chemical Reaction

Section 1: What is a Chemical Reaction Section 1: What is a Chemical Reaction I can describe and give examples of physical and chemical changes. I can identify reactants and products. I can explain what happens to molecules in chemical reactions

More information

Activation Energy is the minimum amount of energy needed to start a chemical reaction.

Activation Energy is the minimum amount of energy needed to start a chemical reaction. 5.3 Controlling Chemical Reactions Vocabulary: Activation energy Concentration Catalyst Enzyme Inhibitor - How do reactions get started? Chemical reactions won t begin until the reactants have enough energy.

More information

1/31/2013 CHEMICAL EQUATIONS & REACTIONS NOTES. Write the formulas of the following compounds: 1. nickel (II) chloride. 2. copper (II) nitrate

1/31/2013 CHEMICAL EQUATIONS & REACTIONS NOTES. Write the formulas of the following compounds: 1. nickel (II) chloride. 2. copper (II) nitrate CEMICAL EQUATIONS & REACTIONS NOTES Ionic compounds can form from metals Transition metals do not always follow the patterns that we discussed Can have more than one oxidation number () To identify the

More information

5072 CHEMISTRY (NEW PAPERS WITH SPA) BASIC TECHNIQUES 5067 CHEMISTRY (NEW PAPERS WITH PRACTICAL EXAM) BASIC TECHNIQUES

5072 CHEMISTRY (NEW PAPERS WITH SPA) BASIC TECHNIQUES 5067 CHEMISTRY (NEW PAPERS WITH PRACTICAL EXAM) BASIC TECHNIQUES 5072 CHEMISTRY (NEW PAPERS WITH SPA) BASIC TECHNIQUES 5067 CHEMISTRY (NEW PAPERS WITH PRACTICAL EXAM) BASIC TECHNIQUES LEARNING OUTCOMES a) Be able to write formulae of simple compounds b) Be able to write

More information

Unit 5. Chemical reactions

Unit 5. Chemical reactions Unit 5. Chemical reactions Index 1.- Physical and chemical phenomena...2 2.- What is a chemical reaction?...2 2.1. Chemical equation...2 2.2.- Balance of chemical reactions. Law of conservation of mass...3

More information

Indicate the answer choice that best completes the statement or answers the question.

Indicate the answer choice that best completes the statement or answers the question. Indicate the answer choice that best completes the statement or answers the question. 1. Which of the following bonds is polar? a. F F b. O H c. O O d. H H 2. In the compound, H 2 O, the electrons in the

More information

States & Properties of Matter. Unit 1 Topics 4 & 5

States & Properties of Matter. Unit 1 Topics 4 & 5 States & Properties of Matter Unit 1 Topics 4 & 5 Pure Substances Topic 4 - Elements and Compounds Elements Pure substances that only contain one kind of atom and cannot be separated into a simpler substance.

More information

Physical Science Chapter 21. Chemical Reactions. Link to Fireworks Video with Music. A Nova fireworks video

Physical Science Chapter 21. Chemical Reactions. Link to Fireworks Video with Music. A Nova fireworks video Physical Science Chapter 21 Chemical Reactions Link to Fireworks Video with Music A Nova fireworks video 1 Have you ever been camping? Think about a campfire and toasting marshmallows. What are the chemical

More information

Chemical Reaction Types

Chemical Reaction Types Chemical Reactions Chemical Reaction Types There are 5 types of chemical reactions that you need to know Combination reaction Decomposition reaction Combustion reaction Single replacement (redox) reaction

More information

Chemistry Part 2: We re Not Done Yet!

Chemistry Part 2: We re Not Done Yet! Chemistry Part 2: We re Not Done Yet! WOW! Learning about atoms sure was fun! Let s continue our fascinating exploration of chemicals. What is a Chemical? Chemical: A substance having a constant composition

More information

Gas Laws. Bonding. Solutions M= moles solute Mass %= mass solute x 100. Acids and Bases. Thermochemistry q = mc T

Gas Laws. Bonding. Solutions M= moles solute Mass %= mass solute x 100. Acids and Bases. Thermochemistry q = mc T Name Period Teacher Practice Test: OTHS Academic Chemistry Spring Semester 2017 The exam will have 100 multiple choice questions (1 point each) Formula sheet (see below) and Periodic table will be provided

More information

Atoms What subatomic particles make up the atom?

Atoms What subatomic particles make up the atom? Atoms What subatomic particles make up the atom? What are the masses of the subatomic particles? What do atomic and mass number represent? What does 7 3 Li represent? How are elements arranged in the periodic

More information

Balancing Equations Notes

Balancing Equations Notes . Unit 6 Chemical Equations and Reactions What is a Chemical Equation? A Chemical Equation is a written representation of the process that occurs in a chemical reaction. A chemical equation is written

More information

2 nd Semester Study Guide 2017

2 nd Semester Study Guide 2017 Chemistry 2 nd Semester Study Guide 2017 Name: KEY Unit 6: Chemical Reactions and Balancing 1. Draw the remaining product 2. Write a balanced equation for the following reaction: The reaction between sodium

More information

INTRODUCTORY CHEMISTRY Concepts and Critical Thinking

INTRODUCTORY CHEMISTRY Concepts and Critical Thinking INTRODUCTORY CHEMISTRY Concepts and Critical Thinking Sixth Edition by Charles H. Corwin Chemical Reactions by Christopher Hamaker 1 Chemical and Physical Changes In a physical change, the chemical composition

More information

CHAPTER 7 CHEMICAL REACTIONS: AN INTRODUCTION

CHAPTER 7 CHEMICAL REACTIONS: AN INTRODUCTION Chemistry Name Hour Chemistry Approximate Timeline Students are expected to keep up with class work when absent. CHAPTER 7 CHEMICAL REACTIONS: AN INTRODUCTION Day Plans for the day Assignment(s) for the

More information