Fundamentals of General, Organic & Biological Chemistry 4 th Edition. Matter and Life
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1 Fundamentals of General, Organic & Biological Chemistry 4 th Edition Chapter One Matter and Life Mohammed Hashmat Ali Southeast Missouri State University 2003 Prentice Hall, Inc.
2 1.1 Chemistry: The Central Science Chemistry is often referred to as The Central Science because it is crucial to all other sciences. 2
3 Matter: Anything that has mass and occupies space things you can see, touch, taste, or smell. Property: a characteristic that can be used to describe a substance. Size, color, temperature are most familiar properties of matter. Less familiar properties include: Chemical composition:whatmatterismadeof. Chemical Reactivity: how matters behave. 3
4 Physical Change: Does not alter the chemical makeup of a substance. Change is reversible. Melting of solid ice is a physical change. In this case only change in form takes place and the change is reversible. Chemical Change: Alters chemical makeup of a substance. Change is irreversible. Rusting of iron is a chemical change. Here, iron combines with oxygen and produces a new substance rust. 4
5 States of Matter 5
6 Solids Solids have A definite shape. A definite volume. Particles that are close together in a fixed arrangement. Particles that move very slowly. 6
7 Liquids Liquids have An indefinite shape, but a definite volume. The same shape as their container. Particles that are close together, but mobile. Particles that move slowly. 7
8 Gases Gases have An indefinite shape. An indefinite volume. The same shape and volume as their container. Particles that are far apart. Particles that move fast. 8
9 Summary of the States of Matter 9
10 Learning Check Identify each as: 1) solid 2) liquid or 3) gas. A. It has a definite volume, but takes the shape of the container. B. Its particles are moving rapidly. C. It fills the volume of a container. D. It has particles in a fixed arrangement. E. It has particles close together that are mobile. 10
11 Solution Identify each as: 1) solid 2) liquid or 3) gas. 2 A. It has a definite volume, but takes the shape of the container. 3 B. Its particles are moving rapidly. 3 C. It fills the volume of a container. 1 D. It has particles in a fixed arrangement. 2 E. It has particles close together that are mobile. 11
12 1.3 Classification of Matter Pure Substance: Uniform in its chemical composition and properties. Sugar and water are pure substances. Mixture: Composition and properties may vary. Different amounts of sugar dissolved in water will determine sweetness of water. Sugar water is an example of a mixture. 12
13 Chemical Compounds: Substance that can be broken down into simpler substances. Water is a chemical compound since it can be broken down into hydrogen and oxygen by passing electric current through it. Element: Substance that can not be broken down chemically into simpler substances. Hydrogen, oxygen, nitrogen are example of elements. 13
14 The classification of matter is summarized in Fig 1.4 below. 14
15 1.5 Elements and Symbols 15
16 Elements Elements are pure substances that cannot be separated into simpler substances by ordinary laboratory processes. Elements are the building blocks of matter. There are 115 elements known today. gold carbon aluminum 16
17 Sources of Some Element Names 17
18 Symbols of Elements Every element has a symbol that represents its name. Symbols consist of 1 or 2 letters. Only the first letter in a symbol is capitalized. Examples: 1-Letter Symbols 2-Letter Symbols C carbon Co cobalt N nitrogen Ca calcium F fluorine Al aluminum O oxygen Mg magnesium 18
19 Symbols from Latin Names Several symbols are derived from Latin names. Some examples are shown below: copper, Cu (cuprum) gold, Au (aurum) iron, Fe (ferrum) silver, Ag (argentum) 19
20 Elements in the Body Carbon, oxygen, and hydrogen are the most abundant elements in the human body. 20
21 Physical Properties The physical properties of an element are the characteristics that can be observed without changing the substance. 21
22 Learning Check Select the correct symbol for each: A. Calcium 1) C 2) Ca 3) CA B. Sulfur 1) S 2) Sl 3) Su C. Iron 1) Ir 2) FE 3) Fe 22
23 Learning Check Select the correct name for each symbol: A. N 1) neon 2) nitrogen 3) nickel B. P 1) potassium 2) phogiston 3) phosphorus C. Ag 1) silver 2) agean 3) gold 23
24 Elements The Periodic Table 24
25 Periodic Table The periodic table arranges elements according to similar properties. 25
26 Groups on the Periodic Table On the periodic table, each vertical column is called a group of elements. A group contains elements with similar chemical and physical properties. Each group is identified by a group number at the top of the column. The representative elements have group numbers of 1A 8A. The transition element 26
27 Groups and Group Numbers 27
28 Numbering Groups One numbering system for groups assigns the letter A to the representative elements and the letter B to the transition elements. Another system assigns the numbers 1-18 to the columns across the periodic table. 28
29 Group Numbers Group numbers 29
30 Representative Elements Several groups of representative elements are classified by name. Group 1A Group 2A Group 7A Group 8A Alkali Metals Alkaline Earth Metals Halogens Noble Gases 30
31 Noble Gas Halogen Group Period Alkali Earth Metal Alkali Metal
32 Representative Elements Group 1A, the alkali metals, includes sodium, lithium, and potassium. Group 7A, the halogens, includes chlorine, bromine, and iodine. 32
33 Periods on the Periodic Table On the periodic table, each horizontal row is called a period. A period is identified by a number such as 1, 2, 3, or 4. Periods 2-7 include representative elements and transition elements. 33
34 Learning Check Identify the element described by the following: A. Element in Group 7A, Period 4 1) Br 2) Cl 3) Mn B. Element in Group 2A, Period 3 1) beryllium 2) magnesium 3) boron 34
35 Solution A. Group 7A, Period 4 1) Br B. Group 2A, Period 3 2) magnesium 35
36 Metals, Nonmetals, and Metalloids 36
37 Metals and Nonmetals Metals Are located to the left of the heavy line. Are shiny, ductile, and good conductors. Metalloids Are elements along the heavy line. Have properties of both metals and nonmetals. Nonmetals Are located to the right of the heavy line. Are dull, brittle, poor conductors, and good insulators. 37
38 Comparing A Metal, Metalloid, and Nonmetal 38
39 Learning Check Identify each of the following elements as 1) metal 2) nonmetal 3) metalloid A. sodium B. chlorine C. silicon D. iron E. carbon 39
40 Solution Identify each of the following elements as 1) metal 2) nonmetal 3) metalloid A. sodium 1 metal B. chlorine 2 nonmetal C. silicon 3 metalloid D. iron 1 metal E. carbon 2 nonmetal 40
41 Learning Check Match the elements to the description: A. Metals in Group 4A 1) Sn, Pb 2) C, Si 3) C, Si, Ge, Sn B. Nonmetals in Group 5A 1) As, Sb, Bi 2) N, P 3) N, P, As, Sb C. Metalloids in Group 4A 1) C, Si, Ge, 2) Si, Ge 3) Si, Ge, Sn, Pb 41
42 Solution Match the elements to the description: A. Metals in Group 4A 1) Sn, Pb B. Nonmetals in Group 5A 2) N, P C. Metalloids in Group 4A 2) Si, Ge 42
43 Chapter Summary Chemistry is the study of matter. Matter is anything that has mass and occupies space. Physical change does not alter the chemical makeup of a substance. Change is reversible. Chemical change alters chemical makeup of a substance. Change is irreversible. Pure substances have uniform chemical composition and properties. 43
44 Chapter Summary Contd. Composition and properties of a mixture may vary. Substance that can be broken down into simpler substances is a chemical compound. Substance that can not be broken down chemically into simpler substances is known as an element. Elements are represented by one or two letter symbols. First letter is always capitalized and the second letter is always a lower case. 44
45 Chapter Summary Contd. Chemical Formula is a notation for chemical compound to show how many atoms of each element are present. Periodic Table is a representation of 113 elements in a tabular format. Elements are roughly divided into 3 groups Metals Nonmetals Metalloids 45
46 End of Chapter 1 46
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