1. The chemistry of Life

2. The chemistry of Life Elements: The smallest part that something can be broken down into. Everything is made of elements 4 Key elements in the human body O Oxygen 65% C Carbon 18.5% H Hydrogen 9.5% N Nitrogen 3.3% Trace amounts of elements

3. The chemistry of Life Atoms: The building Blocks of Elements Atoms are the smallest particle of an element that still has the characteristics of that element

4. Nucleus: Center of the atom made up of Protons (+) and Neutrons (neutral) Electrons (-) orbit around the nucleus

5. Compounds: a substance that is composed of two or more different elements ex. Salt (NaCl) Water (H2O) Types of bonds Covalent: Share Electrons (more common) Ionic: Transfer Electrons

6. Chemical Reactions: occur when bonds are either formed or broken. The breaking of the bonds releases energy.

7. Mixtures: A combination of substances in which they individual components retain their own properties. ( ex. Sand and sugar combined) Can be easily seperated

8. Solutions: A mixture in which one or more substances (Solutes) are distributed evenly in another substance (Solvents) The particles will not settle out Ex. gatorade