Periodic Table Crossword

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Across
  1. 2. Has valence values +4 and +2 and is a transition metal
  2. 5. Is the heaviest element
  3. 8. Has atomic number 6
  4. 11. Has atomic mass 88.906
  5. 13. Is a diatomic with mass 35.453
  6. 14. Has atomic symbol Au
  7. 15. Has symbol TC
Down
  1. 1. has atomic number 99
  2. 3. Has valence charges +7, +4, and +2
  3. 4. Is the first metalloid element.
  4. 6. Has atomic number 37
  5. 7. Is the fourth Noble Gas
  6. 9. Is the start of the Lanthanide series
  7. 10. Has atomic number 1
  8. 12. Has atomic mass 15.999