Crossword Puzzle 7A and 7B key terms

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Across
  1. 3. A combination of chemical formulas and symbols that models a chemical reaction.
  2. 8. A chemical reaction in which a single reactant breaks down into two or more products.
  3. 12. SI fundamental unit for the quantity of matter in a substance; a count equal to 6.022 x 2023.
  4. 13. A substance that enters into a chemical reaction.
  5. 14. A positive or negative number showing the electric charge on an element when it forms a compound.
Down
  1. 1. A chemical reaction in which one element in a compound is replaced by another element; also known as a single-displacement reaction.
  2. 2. A chemical reaction in which two compounds swap cations or anions with each other; also know as a double-displacement reaction.
  3. 4. A gain of electrons in a chemical reaction.
  4. 5. A chemical reaction in which two or more reactants combine into a single, more complex product.
  5. 6. A substance that is formed during a chemical reaction.
  6. 7. The mass of one mole of a substance.
  7. 9. A process that rearranges the atoms in one or more substances into one or more new substances.
  8. 10. An exothermic reaction in which a fuel reacts with oxygen.
  9. 11. A number placed in front of a chemical formula within a chemical equation that shows how many units of a reactant or product are needed to balance the chemical equation.