Element crossword puzzle

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Across
  1. 2. the result of a chemical reaction
  2. 4. group of elements that have a full valence shell
  3. 7. able to be shaped without breaking or cracking
  4. 8. a substance that increases the rate of a chemical reaction
  5. 10. atoms that are connected by sharing electrons
  6. 12. the number of valence electrons neon has
  7. 13. determined by the number of protons in an atom
  8. 15. the family group chlorine is in
  9. 17. able to be formed and reformed without losing toughness, not brittle
  10. 19. the family group that iron is in
  11. 20. atoms the are attracted by giving or receiving electrons
  12. 21. group of elements that are extremely reactive and water sensitive
  13. 22. the amount of matter in a single element of an atom
Down
  1. 1. the number of electron shells sodium has
  2. 3. the measure of how well an electrical charge can pass through a substance
  3. 5. the second most reactive group
  4. 6. the subatomic particles on the outer ring of an atom
  5. 9. elements that go into a chemical reaction
  6. 11. have properties of metals and nonmetals
  7. 14. subatomic particles with no charge
  8. 16. chart that organizes elements by atomic number and electron rings
  9. 18. does not react easily with other elements