science project

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