science project

123456789101112131415
Across
  1. 1. element in group 1
  2. 6. 1,2,12,13,14,15,16,17,18,horizontal
  3. 8. 1-8, how many rings there are
  4. 10. "lewis structure" represents valence electrons
  5. 13. atoms share 2 pairs of electrons
  6. 14. bond, shares electrons
  7. 15. group 18 element
Down
  1. 2. atoms share 3 pairs of electrons
  2. 3. 2+ chemically combined electrons
  3. 4. what is the ______ for carbon? C.
  4. 5. an atom with a charge
  5. 7. group 17 element
  6. 9. Number of protons in nucleus
  7. 11. bonding between elements opposite side or periodic table
  8. 12. 1-7, horizontal on periodic table