Electrons on the Move
Across
- 7. The number of protons or electrons
- 8. Cu
- 9. Neutrally charged particle
- 11. How much one atom of one element weighs
- 12. N
- 14. O
- 15. Na
Down
- 1. F
- 2. C
- 3. H
- 4. K
- 5. Positively charged particle
- 6. Negatively charged particle
- 7. They make up everything
- 10. The rings surrounding the nucleus of an atom
- 13. Fe