Chapter 7 Vocabulary

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Across
  1. 4. eactions that occur when two different atoms or molecules interact to form a different molecule or compound
  2. 8. reaction where heat energy is absorbed
  3. 14. any chemical reaction in which the oxidation number of a molecule, atom, or ion changes by gaining or losing an electron
  4. 15. substance present after a chemical reaction
Down
  1. 1. symbolic representations of chemical reactions where reactants and the products are expressed
  2. 2. a chemical reaction in which a fuel undergoes oxidation by reacting with an oxidising agent, resulting in the release of energy
  3. 3. substance that undergoes change in a reaction
  4. 5. a reaction in which one element is substituted for another element in a compound
  5. 6. a chemical reaction in which one reactant breaks down into two or more products
  6. 7. the amount of substance of a system which contains as many elementary entities
  7. 9. energy stored in the bonds of chemical compounds, like atoms and molecules.
  8. 10. reaction where heat engery is released
  9. 11. a number placed in front of a chemical symbol or formula
  10. 12. reactions in which the positive and negative ions of two ionic compounds exchange places to form two new compounds
  11. 13. the ratio between the mass and the amount of substance