Across
- 4. a column of elements in table
- 5. number 6 in the table
- 9. number of protons
- 10. number one in the table
- 12. number 7 in the table
- 15. a element term for metals
- 17. the gas inside a balloon
- 18. seven elements in group 18
- 19. number 93 in the table
Down
- 1. number 16 in the table
- 2. number 28 in the table
- 3. number 11 in the table
- 6. number 5 in the table
- 7. The periodic _____
- 8. horizontal row in table
- 11. the basic units of matter
- 13. a thing that is not metal
- 14. number 13 in the table
- 16. A element that we breathe
- 20. number 26 in the table