Elements in the Periodic Table

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Across
  1. 1. Has 6 protons
  2. 3. Mass number is 27
  3. 8. Has 17 electrons
  4. 9. Period 2, Group 2
  5. 11. Chemical symbol is 'K'
  6. 13. Period 3, Group 2
  7. 15. Atomic number is 5
  8. 17. Has no neutrons
  9. 18. Has 7 electrons
  10. 19. Mass number is 19
Down
  1. 1. Has 20 protons
  2. 2. Has 3 protons
  3. 4. Has electron configuration 2,8,8
  4. 5. Chemical Symbol 'Na'
  5. 6. Has 10 electrons
  6. 7. Chemical Symbol is 'He'
  7. 10. Has electron configuration 2,8,6
  8. 12. Atomic number is 16
  9. 14. Period 3, Group 15
  10. 16. Has electron configuration 2,6