Periodic Table of Elements

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Across
  1. 3. 6 neutrons
  2. 6. atomic mass of twelve
  3. 8. fifteenth group and fourth period
  4. 9. fifth period in the halogens family
  5. 11. atomic symbol U
  6. 12. forty-three protons
  7. 15. fourth period in the eighteenth group
  8. 17. metal with 58 electrons
  9. 19. thirty-one electrons
Down
  1. 1. first period in the first group
  2. 2. atomic mass of a hundred and thirty-one
  3. 4. fourth period in the second group
  4. 5. atomic symbol of Cs
  5. 7. metal with twelve neutrons
  6. 10. atomic symbol V
  7. 13. tenth group in the fourth period
  8. 14. atomic number of twenty-nine
  9. 16. metalloid in the sixth period
  10. 17. atomic mass of fifty-nine
  11. 18. seventh period in the alkaline family