Across
- 3. too big to fit
- 4. Sad energy
- 5. bad coductivity
- 9. very angry elements
- 10. up and down
- 12. radioactive
- 15. almost as angry as alkaline metals
- 16. location of most of the mass
- 17. Happy elements
- 18. Happy energy
- 19. really wants to be happy
- 20. different element versions
Down
- 1. silicon valley
- 2. left and right
- 6. Russian chemist
- 7. Big group of elements
- 8. average weight of element
- 11. shiny and conductive
- 13. charged atom
- 14. elements identitiy