1. Classification of Matter

3. Pure Substances
Have specific properties that identify it (physical or chemical)
Can be elements or compounds

4. Elements Substances with only one kind of atom
Can be monatomic or in molecules
O2 or O3 or N2
May have more than one form called allotropes– ex O2 and O3

5. Allotropes of C

6. Periodic Table

7. Pure Substances cont’d
Compounds- composed of more than one kind of atom
Have definite composition
Properties are different than those of the individual elements
Are represented by formulas
Ex H2O2, symbols represent the elements and subscripts give the number of atoms of that element in the compound
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8. Mixtures Composed of two or more pure substances
Each component retains it’s properties
Can use those properties to separate components
Homogenous- substances evenly distributed
Solution, alloy
Heterogeneous- not evenly distributed
Suspension, colloid

10. Show examples in class