Across
- 5. atomic mass is 4.002602
- 6. named after the US 5 cents
- 7. is highly reactive
- 8. Georg Brandt discovered cobalt in 1735
- 11. has 6 valence electrons
- 12. 2nd most abundant element in the earths crust
- 13. was discovered in 2,000 BC
- 15. there are 26 neutrons in titanium
- 17. is the 23rd most common element on the sun
- 19. has no scent
- 20. yellow greenish gas
Down
- 1. number of protons 5
- 2. is very hard to find
- 3. children need zinc for growth
- 4. was name was ekasilicon
- 9. by weight beryllium has 6x stiffness
- 10. An early name for magnesium was magnium
- 14. was discovered twice
- 16. the Exitance of gallium wad predicted by a scientist
- 17. the atomic number is 34
- 18. steel could not be made without iron