Chemical Reaction Crossword

12345678910
Across
  1. 2. The name of a charged atom
  2. 7. Causes the reaction to be faster
  3. 8. A substance that undergoes change during a reaction
  4. 9. A chemical reaction that absorbs heat from around it
  5. 10. Builds up on metal when oxygen and water react with it
Down
  1. 1. The outermost shell of an atom
  2. 3. The equivalent of 2 elements mixing
  3. 4. A reaction when the electrons get absorbed
  4. 5. Binary compound for oxygen
  5. 6. A chemical reaction that emits heat or light