Chemistry Crossword Puzzle #2

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Across
  1. 1. element in group 16
  2. 5. nitrate (NO2−3) is an example of this
  3. 6. conducts electricity and heat, but contains attributes of both metals and nonmetals
  4. 9. uncharged particle
  5. 10. unit of mass equal to 1/12 of the mass of a 12C atom
  6. 12. Hard and shiny. usually used to conduct electricity
  7. 13. element in group 15
  8. 16. horizontal row of the periodic table
  9. 18. negatively charged atom or molecule
Down
  1. 2. usually dull and does not conduct electricity and heat well
  2. 3. element in group 17
  3. 4. contains unequal numbers of protons and electrons
  4. 7. sulfuric acid is an example of this
  5. 8. a unit equivalent to AMU
  6. 9. middle of atom
  7. 11. vertical column of the periodic table
  8. 13. positively charged particle
  9. 14. a compound that contains water molecules
  10. 15. positively charged atom or molecule
  11. 17. negatively charged particle