Vocab 6 and 7 Crossword

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Across
  1. 4. an atom or group of atoms that has a positive or negative charge
  2. 5. a substance that undergoes change in a chemical reaction
  3. 7. a representation of a chemical reaction in which the reactants and products are expressed as formulas
  4. 10. a diagram of an atom where each dot represents a valence electron
  5. 11. a chemical reaction in which two or more substances react to form a single substance
  6. 13. a chemical reaction that releases energy to its surrounding
  7. 15. a chemical bond in which two atoms share a pair of valence electrons
  8. 16. the energy stored in chemical bonds
  9. 17. the force that holds cations and anions together
Down
  1. 1. a new substance that forms as a result of a chemical reaction
  2. 2. a chemical reaction in which electrons are transferred from one reactant to another
  3. 3. numbers that appear before a formula in a chemical equation to show the relative proportions of each reactant and product
  4. 6. a notation that shows what elements a compound contains and the ration of the atoms or ions of these elements in the compound
  5. 7. a chemical reaction in which a substance reacts rapidly with oxygen, often producing heat and light
  6. 8. an ion with a negative charge
  7. 9. an amount of a substance that contains approximately 6.02 x 10^23 particles of the substance
  8. 12. a neutral group of atoms that are joined together by one or more covalent bonds
  9. 14. an ion with a positive charge