Across
- 6. has an atomic number of 13
- 7. required for animals and plants to survive
- 9. can be used as a sunscreen
- 12. has an atomic mass of 140.116 u
- 13. soft, silvery alkaline metal
- 14. atomic number of 50
- 15. symbol of Mg
- 17. has an atomic number of 1
- 19. atomic number of 31
Down
- 1. symbol of Cl
- 2. atomic number of 32
- 3. symbol of Be
- 4. is in the fourth row in family IA on the periodic table.
- 5. has an atomic mass of 20.197 u
- 8. has the highest conductivity of any element
- 10. belongs to group 14 of the periodic table
- 11. has 92 protons and electrons
- 16. has a symbol of Ag
- 18. symbol of Ni