Across
- 5. was discovered in 1807
- 6. colorless gas odorless
- 7. atomic number is 19
- 10. was discovered in 1775
- 12. part of halogens
- 14. most abundant element on earth
Down
- 1. discovered by sir Humphrey Davy
- 2. 26 neutrons and 22 protons
- 3. it's atomic number is 29
- 4. luster is dull
- 8. solid blue with grey metallic luster
- 9. we have it in a lot of our foods.
- 11. cannot be cut with a knife
- 13. first metal to be discovered