Physical Science Chapter 7 Vocab

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Across
  1. 5. a representation of a chemical reaction in which the reactants and products are expressed as formulas
  2. 6. chemical reaction in which a compound and an element exchange positive ions and form a new compound and lone element
  3. 9. a chemical reaction in which the conversion of reactants into products and the conversion of products into reactants happens at the same time
  4. 10. a chemical reaction in which two compounds exchange positive ions and form two new compounds
  5. 12. a chemical reaction in which a substance reacts rapidly with oxygen, often producing heat and light
  6. 14. a chemical reaction that absorbs energy to its surroundings
  7. 18. a chemical reaction in which one substance is oxidized (loses electrons) and one substance is reduced (gains electrons)
  8. 19. a substance that affects the rate of a chemical reaction without being used up in the reaction
Down
  1. 1. a chemical reaction in which two or more substances react to form a single substance
  2. 2. the energy stored in chemical bonds
  3. 3. the rate at which reactants change into products over time
  4. 4. an amount of a substance that contains approximately 6.02 x 1023 particles of a substance
  5. 7. a substance that undergoes change in a physical reaction
  6. 8. a chemical reaction in which a compound breaks down into tow or more simpler substances
  7. 11. a chemical reaction that releases energy to its surroundings
  8. 13. a state in which the forward and reverse paths of a physical or chemical change take place at the same rate
  9. 15. the mass of one mole of a substance
  10. 16. new substances formed as a result of a chemical reaction
  11. 17. numbers that appear before a formula in a chemical equation to show the relation proportions of each reactant and product