Across
- 2. Number 3 on the periodic table
- 5. the rows of chemical elements
- 8. Has a atomic mass of 12
- 10. In group 18 of the periodic table
- 11. The first column of the peroidic table
- 13. on the left
Down
- 1. Has a atomic mass of 32
- 3. Has a letter of FE
- 4. Columns of the chemical elements
- 6. The elements that are on the staircase
- 7. The last column of the periodic table
- 8. Number 20 on the periodic table
- 9. Has a atomic mass of 16
- 12. Number 16 on the perodic table
- 14. Number 82 on the perodic table