Across
- 3. I have 3 shells and my valency is 4 (7)
- 4. I have only one shell and my valency is 1 (6)
- 7. My symbol is 'S' (7)
- 9. I have 2 valencies-3 and 5 (10)
- 10. I am found in a greenhouse gas.My mass number is 12. (6)
- 12. My mass number is 35.5 (8)
- 13. I have 12 neutrons and 12 protons (9)
- 14. My atomic number is 13 (9)
Down
- 1. My symbol is 'B' (5)
- 2. I have 4 neutrons (7)
- 5. I have a valency of 0 and have 3 shells (5)
- 6. I have 2 shells and each shell has 2 electrons (9)
- 8. I am a component of water and my atomic number is 1 (8)
- 9. My mass number is 39 and my symbol is 'K' (9)
- 11. My symbol is 'Na' (6)