Chemistry

123456789
Across
  1. 1. reaction a change of physical form
  2. 3. shiny and reflective
  3. 5. a positive electric charge
  4. 7. the center of an atom
  5. 8. a substance that cannot be decomposed into another substance
  6. 9. a row of chemical elements
Down
  1. 1. can hold electricity
  2. 2. the amount of space an object takes up
  3. 4. two elements formed together
  4. 6. the ability to become another object when pressed