Chapter 7 Vocab

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Across
  1. 4. direct combination reaction is a type of chemical reaction in which two or more simple substances combine to form a more complex product.
  2. 8. release energy to their surroundings
  3. 14. type of chemical reaction that involves a transfer of electrons between two species.
  4. 15. something made as a result of a chemical reaction.
Down
  1. 1. the symbolic representation of a chemical reaction in the form of symbols and chemical formulas.
  2. 2. when a substance reacts with oxygen and releases a huge amount of energy in the form of light and heat.
  3. 3. a substance that takes part in and undergoes change during a reaction.
  4. 5. replaces one element for another in a compound.
  5. 6. a compound is broken into smaller chemical species.
  6. 7. a convenient way to express amounts of reactants and products of chemical reactions.
  7. 9. the energy of chemical substances that is released when the substances undergo a chemical reaction and transform into other substances.
  8. 10. absorbs energy from their surroundings
  9. 11. the numbers placed before the reactants in a chemical equation
  10. 12. type of chemical reaction that occurs when two reactants exchange cations or anions to yield two new products.
  11. 13. the ratio between the mass and the amount of substance (measured in moles) of any sample of said compound.