Perodic Table and Trends

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