Across
- 2. Negative charge
- 3. Positive charge
- 8. The rows horizontal
- 9. First group
- 10. number located on the top,left side of an element
- 13. elements in group 18
- 14. different #'s of protons and neutrons
- 15. electrically charge atom
Down
- 1. negatively charged ion
- 4. central part of an atom
- 5. elements in group 17
- 6. elements located on the left side
- 7. elements located on the right side
- 11. outside of nucleus
- 12. Neutral charge