covalent

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Across
  1. 2. big orange fruit
  2. 5. carbon----- is CO2
  3. 6. metal and nonmetal bonding
  4. 7. found in the atmosphere
  5. 10. pumpkin, candy, witches
  6. 12. layer above troposphere
  7. 13. layer closest to earth
Down
  1. 1. one oxygen in a compound
  2. 2. come before a word to give it value
  3. 3. nonmetal bonding
  4. 4. she wears a black hat
  5. 8. the heat layer on earth
  6. 9. come at the end of the word
  7. 11. the letter "C" on the periodic table