Chemical Reactions

12345678910
Across
  1. 2. when two or more substance combine to make a new substance
  2. 3. how to represent a chemical reaction using plus signs and arrows
  3. 6. the materials we start with in a chemical reaction
  4. 7. type of reaction that releases heat
  5. 8. type of reaction that absorbs heat
  6. 10. matter cannot be created or destroyed
Down
  1. 1. the larger numbers in front of chemical formulas used to multiply
  2. 4. how to represent a substance using element symbols and numbers
  3. 5. the materials we end with in a chemical reaction
  4. 9. the smaller numbers in a formula below and to the right of an element symbol