Elements of the periodic table

Edit Answers
123456789101112131415161718
Across
  1. 3. The first element
  2. 6. Atomic symbol K
  3. 9. Element with a full outer shell
  4. 10. Electronic configuration 2,8,5
  5. 12. Electronic Configuration 2,8,8,2
  6. 14. Group 4, period 3
  7. 16. A light element we use in balloons
  8. 17. An element with 7 electrons in the second shell
  9. 18. An element with a full outer shell
Down
  1. 1. An element with mass of 12
  2. 2. An element with 12 electrons
  3. 4. The lightest Group 5 element
  4. 5. An element with 5 Protons
  5. 7. An element with a mass of 27
  6. 8. Atomic symbol Na
  7. 11. An element with 5 electrons
  8. 12. Element used in bleach (Group 7)
  9. 13. An needed for light batteries
  10. 14. Period 3, Group 6
  11. 15. An element that is needed for fire to burn