Periodic Table Crossword Puzzle

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Across
  1. 2. one to two letter abbreviation of the element.
  2. 5. Heavy particles with no charge.
  3. 7. atoms with a charge.
  4. 9. The rows on the periodic table.
  5. 10. Negative charge particles.
  6. 12. The number of protons and neutrons in one atom of an element added together.
  7. 13. The number of protons only found in one atom of a specific element.
  8. 14. Good conductors at certain temperatures, but bad conductors at other temperature.
Down
  1. 1. Heavy particles with positive charge.
  2. 3. Poor conductors of electricity.
  3. 4. Good conductors of energy.
  4. 6. The number of protons and neutrons in one atom of an element.
  5. 8. The total mass in grams of a single mole of a substance.
  6. 11. The up and down columns on the periodic table, also called families.