Unit 8 Chemical Reactions Vocabulary

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Across
  1. 7. change in which no new chemical substances are formed; can usually be reversed
  2. 8. number in front of a balanced formula telling how many molecules of that element or compound are present; is changed to balance an equation
  3. 9. process where bonds between atoms are broken and new ones are formed, producing one or more different substances
  4. 10. a chemical reaction that occurs when a substance reacts with oxygen, releasing energy in the form of heat and light
  5. 11. a solid that forms during a chemical reaction in solution
  6. 12. A + BC ---> AC + B; a chemical reaction that occurs when the atoms of one element replace the atoms of another element in a compound
Down
  1. 1. AB + CD ----> AD + CB ; always involves at least 4 elements
  2. 2. A + B ----> AB, a reaction in which two or more substances combine to form a new compound
  3. 3. AB ---> A + B ; a reaction in which a single compound breaks down to form two or more simpler substances
  4. 4. water that contains dissolved substances
  5. 5. conversion factor that relates the amounts in moles of any two substances in a chemical reaction
  6. 6. change resulting in a new substance being formed