August 31 st, 2015 page 21 DO: I will be able to differentiate between atoms, elements, molecules, and compounds. EQ: How are molecules created?
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1 August 31 st, 2015 page 21 DO: I will be able to differentiate between atoms, elements, molecules, and compounds. EQ: How are molecules created? Explain this statement: All compounds are molecules but not all molecules are compounds.
2 Warm Up Questions 1.The melting point and boiling point of silver are 960 degrees C and 1950 degrees C respectively. What is the freezing point of silver? a. 0 degrees C b. 100 degrees C c. 960 degrees C d degrees C 2. Which of the following is an element? a. NaCl b. Fe3O2 c. OH d. Fe
3
4 Atoms, Elements, Molecules, and Compounds!
5 Atoms The building blocks of matter! the basic unit of a chemical element Composed of charged particles called electrons, protons, and neutrons
6 Location of Subatomic Particles Electrons ATOMS have NO charge because protons and electrons are positive and negative charges and are equal in number. nucleus Neutrons Protons
7 - Electron Protons + Because electrons(-) = protons (+) there is no charge in ATOM as a whole unit NO Neutron Atomic mass + electrons Protons neutrons
8 Element A substance that cannot be separated into simpler substances by chemical means Explanation for how one particular atom behaves (the script or classification of an atom with all the critical information about that atom) Ex: C (carbon), H (hydrogen), Na(sodium), Fe (iron), and Cl (chlorine)
9 The Element Square 6 protons, 6 electrons = 12 total mass of Protons and Neutrons; use the atomic number to subtract Protons from the total to find out Neutrons. 12 total - 6 Protons =6 Neutrons
10 September 1 st, 2015 page 23 DO: I will be able to differentiate between atoms, elements, molecules, and compounds. EQ: How are molecules created? Explain this statement: All compounds are molecules but not all molecules are compounds.
11 Daily Checks 1. Sodium is an element found in table salt. It contains 11 protons and 12 neutrons. How many electrons are found in a neutral atom of sodium? a. 11 b. 12 c. 23 d. 1 Explanation: 2. What does the law of conservation of matter state? A. The total mass of the reactants is greater than the total mass of the products. B. The total mass of the reactants is less than the total mass of the products. C. The total mass of the reactants equals the total mass of the products D. Matter can not change form. Explanation:
12 Daily Checks 1. Sodium is an element found in table salt. It contains 11 protons and 12 neutrons. How many electrons are found in a neutral atom of sodium? Protons(11) = Electrons (11) a.11 b.12 c.23 d.1 2. What does the law of conservation of matter state? A. The total mass of the reactants is greater than the total mass of the products. B. The total mass of the reactants is less than the total mass of the products. C. The total mass of the reactants equals the total mass of the products D. Matter can not change form. 11 Na 23 Starting Mass = Ending Mass Reactants = Products
13 Molecules A molecule is a group of two or more atoms that stick together chemically Ex: H2, CO2, and H2O Example Molecule: 2 Atoms of the same Element Example Molecule: 3 Atoms of different Elements
14 Compounds A compound is a molecule that is made from at least two different elements. Ex: H2O, CO2, CH4, and CH3COO x: acl = sodium chloride Na = sodium Cl = chlorine H2O = water H = hydrogen O = oxygen
15 Explain the statement: All compounds are molecules but not all molecules are compounds
16 Molecules can consist of two of the same elements. Compounds can not! Ex: H2 is a molecule, but not a compound because there is only one kind of element combined
17 Explain the connection.
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