Across
- 3. is directly below calcium
- 4. atomic number 4
- 7. atomic number 54
- 9. radioactive, with no smell
- 11. Lu
- 13. radioactive metal
- 15. Ba
Down
- 1. energy production
- 2. atomic number 109
- 5. radioactive
- 6. element with only one proton
- 8. salt
- 10. dairy
- 12. is liquid at room temperature
- 14. Pm