1. Atoms

2. Atoms Smallest particles of matter
Contain protons, electrons, & neutrons

3. Element Substance that contains only one kind of atom.
Example: Sulfer, Oxygen, etc.

4. Molecule 2 or more of the same atoms A model of an oxygen molecule. O2

5. Compound 2 or more different atoms combine chemically
Example: Table salt (NaCl), water (H2O), sugar (C6H12O6), etc.

6. Mixture
When two or more substance are mixed together but NOT chemically
Example: salad

7. Here is where you start taking notes…if you already haven’t. 

8. Elements on the Periodic Table
Krypton 36 Kr
83.80
Atom Mass
Element (name)
Atomic Number
Symbol

9. What an atom looks like:

10. What does this look like as an atom
What does this look like as an atom? We need to find the number of protons, electrons, and neutrons.

11. How to find # of protons, electrons, & neutrons in an atom.
Protons = Atomic Number
Electrons = Atomic Number
Neutrons: Atomic Mass – Atomic Number = Neutrons
*Round Atomic Mass to the nearest whole number
Krypton 36 Kr
83.80
Atomic Mass
Element (name)
Atomic Number
Symbol