Science Chemical Reactions Crossword.

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Across
  1. 4. A reaction that involves oxygen and produces heat
  2. 6. The reaction containing two compounds exchanging ions
  3. 9. The number written in front of a formula in equations
  4. 10. A solid formed in a solution reaction
  5. 12. The substance formed in a chemical reaction
  6. 15. The Term for a substance that speeds up reactions
  7. 17. The substances present at the start of a reaction
  8. 19. A sign of a chemical change
  9. 21. The reaction involving both acids and bases
  10. 23. The law that states matter is not created or destroyed
  11. 24. The term for a chemical equation with equal atoms on both sides
Down
  1. 1. The process of gaining electrons
  2. 2. The color change in a reaction
  3. 3. A type of bond is formed by electrons sharing
  4. 5. The reaction that releases heat
  5. 7. The reaction that absorbs heat
  6. 8. The minimum energy needed to start a reactions
  7. 11. A type of bond involving electrons transfers
  8. 13. The reaction that occurs in batteries
  9. 14. The reaction that breaks a compound into parts
  10. 16. The reaction that combines two or more substances
  11. 18. The reaction that goes both forward and backwards
  12. 20. A gas that is commonly produced in metal-acid reactions
  13. 22. The process of losing electrons
  14. 24. The term for substances that resist changes in pH