Across
- 3. sub-atomic particle with a negative (-) charge
- 6. part of the atom where protons and neutrons are found
- 9. N
- 10. Fe
- 14. He
- 15. Au
- 17. 29
- 19. O
- 20. C
- 21. 13
Down
- 1. K
- 2. 10
- 4. Ag
- 5. H
- 7. Na
- 8. Mg
- 11. subatomic particle with no charge
- 12. Pb
- 13. Zn
- 16. 3
- 18. type of charge that an electron has
- 20. Ca
