Chapter 7 Vocabulary

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Across
  1. 4. 6.02214076 × 1023 of some chemical unit, be it atoms, molecules, ions, or others.
  2. 7. the species formed from chemical reactions.
  3. 8. a reaction in which a substance reacts with oxygen gas, releasing energy in the form of light and heat.
  4. 9. the mass of a given chemical element or chemical compound (g) divided by the amount of substance (mol).
  5. 10. a chemical reaction that involves the release of energy in the form of heat or light.
  6. 11. a number placed in front of a chemical symbol or formula that shows how many atoms or molecules of the substance are involved in the reaction
  7. 12. a chemical process in which two or more simple elements or compounds combine to form a more complex product
  8. 13. a substance that takes part in and undergoes change during a reaction.
  9. 14. reactions that involve the transfer of electrons from one species to another.
  10. 15. a reaction in which one element replaces a similar element in a compound
Down
  1. 1. a reaction in which the positive and negative ions of two ionic compounds exchange places to form two new compounds
  2. 2. symbolic representations of chemical reactions in which the reactants and the products are expressed in terms of their respective chemical formulae.
  3. 3. any chemical reaction that absorbs heat from its environment
  4. 5. a reaction in which a compound breaks down into two or more simpler substances
  5. 6. energy stored in the bonds of atoms and molecules.