Chemistry Crossword

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Across
  1. 2. Catalyst involved in a chemical reaction in living things.
  2. 4. The smallest part of an element that is representative of that element.
  3. 6. A material that that electric charge can move through easily.
  4. 7. Shiny, malleable, ductile element that conducts electricity.
  5. 10. Chemical reaction that takes place in cell.
  6. 15. Change of state from a liquid to gas.
  7. 16. Chemical combination of two or more elements in a specific ratio.
  8. 19. Chemical reaction that releases energy.
  9. 20. Anything that has mass and occupies space.
  10. 21. Slow chemical change that occurs when oxygen in the air reacts with a metal.
  11. 22. Change of state from solid to liquid.
Down
  1. 1. Number of protons in the nucleus of one atom of an element.
  2. 3. Invisible negatively charged particle that orbits the nucleus of an atom.
  3. 4. Measure of atomic mass.
  4. 5. Description of a substance that can be pounded or rolled into sheet.
  5. 8. Chemical reaction that absorb energy.
  6. 9. Substance that helps a chemical reaction to proceed more quickly.
  7. 10. Change of state from a gas to liquid.
  8. 11. Change of state from a gas to solid.
  9. 12. Vertical column of element in the periodic table.
  10. 13. Group 17 elements in the periodic table.
  11. 14. Substance that strongly resist the flow of electricity.
  12. 17. Chang of state from a liquid to solid.
  13. 18. Amount of mass in a given volume of a substance.
  14. 23. Ability to work.