Periodic table

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12345678910111213141516
Across
  1. 4. K
  2. 6. Second element
  3. 8. Many of the same type of atoms
  4. 10. Na
  5. 12. Atomic mass of 12
  6. 14. Atomic number 7
  7. 15. What we take from the air
  8. 16. Atomic number 5
Down
  1. 1. Atomic mass of 24
  2. 2. Pb
  3. 3. Atomic number 3
  4. 5. Au
  5. 6. First element
  6. 7. Hg
  7. 9. W
  8. 11. Atomic Mass of Helium
  9. 13. Fe
  10. 14. Atomic Mass 20.18