Across
- 2. 2,16
- 4. atomic mass 30.97
- 6. symbol is Fe
- 8. found in bones atomic number is 20
- 9. symbol is Ag
- 10. 38.72 neutrons
- 11. positive partials in the nucleus
- 15. 7.01 in group 15
- 16. has 28 neutrons
- 17. I have 10 neutrons and live in group 17
- 18. atomic mass is 63.55
- 19. 4,5
- 21. found in 1,7
Down
- 1. symbol is Os
- 2. found in 7,18
- 3. 6,11
- 5. symbol is S
- 7. symbol is Xe
- 8. atomic number is 17
- 12. 18 protons
- 13. lightest noble gas
- 14. 74.6 neutrons
- 16. basics of life
- 20. compound to prevent rust