1. Warm Up Question –Name the three subatomic particles. –List anything you think you might know about them.

2. Matter & The Atom

3. Matter Anything that has mass and takes up space (has volume) Made up of different kinds of atoms

4. All matter is made of atoms

5. Atomic Structure Inside Nucleus Protons Neutrons Outside Nucleus-Electrons

6. Atomic Structure Electrons Tiny Negative charge Move outside the nucleus

7. Atomic Structure Protons Big Positive charge Inside the nucleus

8. Atomic Structure Neutrons Big No charge: neutral Inside the nucleus

9. energy level nucleus electrons+ + protons neutrons- - Atomic Structure

10. Describing Atoms Atomic Number = # of protons the # of protons = the # of electrons Atomic Mass Number = protons + neutrons.

11. Valence Electrons: Only the electrons in the outer shell of an atom

12. Think About It … Make a Brace Map of an Atom. Break it down into its three subatomic particles and list a few characteristics of each.