Chemistry Crossword Puzzle

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Across
  1. 2. the reaction in which molecules break down
  2. 4. elements naturally found in pairs
  3. 5. the ability for a material to be flattened or rolled
  4. 6. the ability for a material to be stretched
  5. 8. the outermost shell in an atom
  6. 9. an atom that has either gained or lost an electron
  7. 10. the lowest temperature that a liquid will ignite
  8. 12. the bond formed when two atoms share electrons
  9. 14. compounds formed with no metals
  10. 16. HNO3
  11. 17. chloric acid
  12. 18. the reaction that occurs when two different atoms join together to make a molecule
Down
  1. 1. the most stable element group on the periodic table is the _______
  2. 2. the reaction when two different molecules switch atoms
  3. 3. materials that change colour depending on if it is exposed to a acid or base
  4. 7. the first group on the periodic table is the __________
  5. 9. compounds that have both a metal atom and a nonmetal atom
  6. 11. the ability to be dissolved into a liquid
  7. 13. in order for neutralization to occur, a salt and ____ must be made in a reaction
  8. 15. CxHy + O2 → H2O + CO2