Matter...

is made of Atoms

Atoms...

that are alike

form Elements

Elements...

form

Compounds

Element- substance that cannot be broken down any further

-each element has a set of properties that distinguishes it from other elements

- 92 naturally occurring elements

C, H, O, N, P, S-

make up 97 % of living things

Carbon Nitrogen

Hydrogen Phosphorous

Oxygen Sulfur