Periodic Table Crossword

1234567891011121314151617181920
Across
  1. 7. group 2 of the periodic table| forms +2 ions
  2. 8. element with the electron configuration of 2-8-18-1
  3. 9. amount of energy that is needed to take a electron away from an atom
  4. 10. group 1 of the periodic table| forms +1 ions
  5. 11. group 17 of the periodic table| most reactive nonmetal
  6. 12. element found at period 6, group 14
  7. 13. element with the electron configuration of 2-1
  8. 18. element with an atomic number of 19
  9. 19. element with an atomic number of 35
  10. 20. element with the electron configuration 2-8-10-2
Down
  1. 1. the first element in period 1
  2. 2. element with an atomic mass of 32.065
  3. 3. amount of attraction an atom has to other electrons
  4. 4. elements that have an atomic number higher than 92| not found in nature
  5. 5. the most reactive nonmetal
  6. 6. group that has an octet and does not react
  7. 14. element found at period 5, group 1
  8. 15. element with an electron configuration of 2-8-7
  9. 16. the most reactive metal
  10. 17. element with the symbol Na