Chemistry Crossword

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Across
  1. 1. chemical combination of two or more elements in a specific ratio
  2. 2. group 17 elements in the periodic table
  3. 3. change that results when two or more substances react to create a different substance or substances
  4. 4. group one elements in the periodic table not including hydrogen
  5. 5. a solution in which water is the solvent
  6. 6. mass of one atom of an element
  7. 7. chemical reaction that absorbs energy
  8. 9. catalyst involved in chemical reactions in living things
  9. 11. chemical reaction that releases energy
  10. 13. the smallest part of an element that is representative of that element
  11. 14. number of protons in the nucleus of one atom of an element
  12. 15. measure of atomic mass
Down
  1. 1. a reaction that takes place when two or more substances react to form new substances
  2. 4. group two elements in the periodic table
  3. 8. invisible negatively charged particle that orbits the nucleus of an atom
  4. 10. substance that helps a chemical reaction
  5. 11. pure substance that cannot be broken down into other substances
  6. 12. combination of symbols that represent a compound