Across
- 2. K+1
- 7. parts of an atom (2 words)
- 10. negative particle
- 12. Pb+2
- 13. neutral particle
- 14. number of protons in an element (2 words)
- 17. H+1
- 19. Ca+2
- 20. Cs+1
- 21. CH3COO-1
- 22. NH4+1
- 24. Ag+1
- 25. SO3-2
- 27. Na+1
Down
- 1. HCO3-1
- 3. mass of of an atom (2 words)
- 4. MnO4-1
- 5. Cr2O7-2
- 6. hydrogen-1
- 7. S-2
- 8. a group of electrons surrounding the nucleus (2 words)
- 9. atom with a difference in neutrons
- 11. positive ion
- 14. negative ion
- 15. atom with a difference in electrons
- 16. number of protons plus number of neutrons (2 words)
- 18. center of an atom
- 19. CN-1
- 23. positive particle
- 26. Li+1