Across
- 5. It's earlier name was magnium
- 7. It comes from Scandinavia
- 11. It's the 4th element on the Periodic Table
- 12. It only reacts to fluorine gas
- 14. It's essential in plants
- 15. It is 38% more denser than air
- 17. Name comes from the greek word for moon
- 19. It's probably in almost everything
- 20. It's the 2nd most lightest element
Down
- 1. It was discovered twice
- 2. First element to be isolated by electrolysis
- 3. It has 26 neutrons
- 4. 3rd most abundant element in the ocean
- 6. It was known since ancient times
- 8. Children need it to grow
- 9. It's the 2nd most abundant of all metals
- 10. It's used in stainless steel and magnets
- 11. It smells bad to many humans
- 13. It's found in bones
- 16. It expands when it freezes
- 18. 2nd most abundant element in Earth's core