Chapter 11 Vocab

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Across
  1. 1. A chemical change in which an element or a compound reacts with oxygen
  2. 7. A chemical change in which one element replaces a second element in a compound
  3. 9. A list of elements in order of decreasing activity
  4. 10. An equation for a reaction in solution showing only those particles that are directly involved in the chemical change
  5. 11. A substance that increases the rate of reaction by lowering the activation-energy barrier
  6. 12. A small whole number that appears in front of a formula in a balanced chemical equation
Down
  1. 1. A chemical change in which two or more substances react to form a single new substance
  2. 2. An ion that is not directly involved in a chemical reaction; an ion that does not change oxidation number or composition during a reaction
  3. 3. An expression representing a chemical reaction
  4. 4. A chemical equation in which mass is conserved
  5. 5. A chemical change in which a single compound is broken down into two or more simpler products
  6. 6. A chemical change that involves an exchange of positive ions between two compounds
  7. 7. A chemical equation that does not indicate the relative amounts of reactants and products
  8. 8. An equation that shows dissolved ionic compounds as dissociated free ions