1. Mr. Olivas thinks this is him. I don’t get it!

2. * Smallest part of an element * Has all the properties of the element

3. * Particle buzzing around the nucleus of an atom * It has a negative charge

4. * The dense part in the middle of an atom * Has protons and neutrons in it

5. * The area where electrons move

6. * The particles in the nucleus that are positive

7. * The unit that describes what the mass of the atom or molecule is. * Can be found on the periodic table

8. * The particle in the nucleus of an atom that has no charge but has mass

9. * The number of protons in the atom

10. * The same element(atom) that has different amounts of neutrons.

11. * The number of protons and neutrons in an atom added together

12. * The mass of an atom expressed in atomic mass units or amu.