Periodic table
Across
- 4. K
- 6. Second element
- 8. Many of the same type of atoms
- 10. Na
- 12. Atomic mass of 12
- 14. Atomic number 7
- 15. What we take from the air
- 16. Atomic number 5
Down
- 1. Atomic mass of 24
- 2. Pb
- 3. Atomic number 3
- 5. Au
- 6. First element
- 7. Hg
- 9. W
- 11. Atomic Mass of Helium
- 13. Fe
- 14. Atomic Mass 20.18