Across
- 1. number of protons in lithium
- 2. contains 12 protons
- 5. number of neutrons in lithium
- 7. contains 1 proton
- 8. number of protons in calcium
- 9. same number of protons and neutrons in nitrogen
- 12. number of protons in potassium
Down
- 1. number of neutrons in sodium
- 3. number of electrons in chlorine
- 4. contains 6 protons and neutrons
- 6. contains 8 protons and neutrons
- 10. number of protons in neon
- 11. contains 1 proton and 1 neutron