Ch.6 and Ch.7 Vocab

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Across
  1. 3. -numbers that appear before a formula in a chemical equation to show the relative proportions of each reactant and product
  2. 4. -new substances formed as a result of a chemical reaction
  3. 7. -a chemical bond in which two atoms share a pair of valence electrons
  4. 8. -the force that holds cations and anions together
  5. 10. -the force that holds atoms or ions together as a unit
  6. 11. -a mixture of two or more elements, at least one of which is a metal, that has the characteristic properties of a metal
  7. 14. -a chemical reaction in which two compounds exchange positive ions and form new compounds
  8. 16. -a neutral group of atoms that are joined together by one or more covalent bonds
  9. 17. -an ion with a positive charge
  10. 18. -a representation of a chemical reaction in which the reactants and products are expressed as formulas
  11. 19. -a substance that undergoes change in a chemical reaction
  12. 20. -a chemical reaction in which two or more substances react to form a single substance
Down
  1. 1. -a chemical reaction in which a compound breaks down into two or more simpler substances
  2. 2. -a diagram of an atom, ion or molecule in which each dot represents a valence electron
  3. 5. -notation that shows what elements a compound contains and the ratio of the atoms or ions of these elements in the compound
  4. 6. -a chemical reaction in which one element takes the place of another element in a compound
  5. 9. -the energy stored in chemical bonds
  6. 12. -an ion with a negative charge
  7. 13. -the attraction between a metal cation and the shared electrons that surround it
  8. 15. -an atom or group of atoms that has a positive or negative charge