Chem 1 Crossword

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Across
  1. 4. a reaction in which oxygen reacts with another substance, often producing heat or light
  2. 7. I2
  3. 8. a reactions where two or more substances react to from a single substance
  4. 10. F2
  5. 13. adding a symbol after each formula
  6. 14. a reaction that exchanges of positive ions between two compounds
  7. 15. Br2
  8. 16. N2
Down
  1. 1. speeds up a chemical reaction
  2. 2. O2
  3. 3. small whole numbers that appear right before the formula
  4. 5. Reactants on the left, Products on the right
  5. 6. AB → A+B
  6. 9. what we are producing on the other side of the arrow
  7. 11. A reaction where one of the atoms of one element replaces the atoms of a second element in a compound
  8. 12. Cl2