Across
- 2. center of an atom where protons and neutrons are stored
- 4. electrons on the outer electron shell that determines reactivity
- 6. sub-atomic particle in an atom that has no (0) charge
- 7. column on the periodic table that shows elements reactivity
- 8. protons determine ________
Down
- 1. sub-atomic particle in an atom that has a positive (+) charge
- 3. sub-atomic particle in an atom that has a negative (-) charge
- 5. row on the periodic table that shows how many electron shells are in a atom