1. Unit 1: Materials: Formulating Matter
Section A:
Building Blocks of Chemistry

2. Properties
Physical Properties: properties that can be determined without altering the chemical makeup of the material
color, density and odor
Physical changes: the identity of the substance is not changed
melting, boiling and bending

3. Properties
Chemical properties: properties that involve transforming the substance into new materials
reactivity with acids
tendency to rust

4. Properties
Chemical change: the identity of one or more substances changes and one or more new substances are formed

5. Indications of a Chemical Reaction
Giving off heat & light

6. Indications of a Chemical Reaction
Production of a gas

7. Indications of a Chemical Reaction
Formation of a precipitate

8. Indications of a chemical reaction
Change in color. (sumac leaves change color when chlorophyll is destroyed)

9. Chemical Symbols and Formulas
Chemical symbols- see periodic table
Represent elements (made of atoms of one element)
Example: Al, Na, Pb
Chemical formulas- represent compounds
Compounds- made from chemical combination of elements
Example: NaCl, C6H12O6

10. Symbols and Formulas Name the number and type of atoms in AgNO3
(NH4)2CO3
H2O

11. Chemical Equation Reactants  Products Example: H2 + O2  H2O
Hydrogen and oxygen make water

12. The Chemical Elements
Metals: most of the elements on the periodic table
hard and shiny
conductive
malleable
ductile
Examples: iron, tin, zinc and copper

13. The Chemical Elements Nonmetals: generally gases or brittle solids
nonconductive
Examples: carbon and oxygen

14. The Chemical Elements
Metalloids: elements with properties of both metals and nonmetals
Found on the “stair step line”
silicon and germanium

15. The Periodic Table