Chapter 7

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Across
  1. 3. reaction - a chemical reaction in which a compound breaks down into two or more simpler substances
  2. 6. equation - a representation of a chemical reaction in which the reactants and products are expressed as formulas
  3. 8. reaction - a chemical reaction that releases energy to its surroundings
  4. 9. mass - the mass of one mole of a substance
  5. 10. reaction - a chemical reaction that absorbs energy from its surroundings
  6. 11. - substances that undergo change in a chemical reaction
  7. 12. - numbers that appear before a formula in a chemical equation to show the relative proportions of each reactant and product
Down
  1. 1. reaction - a chemical reaction in which one element takes the place of another element in a compound
  2. 2. reaction - a chemical reaction in which two or more substances react to form a single substance
  3. 3. reaction - a chemical reaction in which two compounds exchange positive ions and form new compounds
  4. 4. - an amount of a substance that contains approximately 6.02 x 1023 particles of the substance
  5. 5. - new substances formed as a result of a chemical reaction
  6. 7. energy - the energy stored in chemical bonds