Chemical Equations and Reactions Crossword Puzzle

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Across
  1. 4. big number in front of compounds in a chemical equation
  2. 7. the letters that make up the symbols for elements, some include subscripts
  3. 11. two or more substances react to form one product
  4. 12. an arrow in a chemical reaction can mean this
  5. 13. staring substance in a chemical reaction
  6. 14. solid, liquid, gas, aqueous
  7. 15. the opposite of synthesis, one reactant breaks down into 2 or more products
  8. 17. new substances formed in a chemical reaction
  9. 18. split elements on one side should be balance ______
  10. 20. when balancing equations the coefficients must be in the lowest, _____ form
Down
  1. 1. counting the number of atoms is called taking the ________
  2. 2. small number on the right of compounds
  3. 3. one element switches place with another element in this type of reaction
  4. 5. all ions in a compound switch places to make two new compounds
  5. 6. states that matter/mass cannot be created nor destroyed, only rearranged
  6. 8. when a chemical reaction occurs, these will be a sign
  7. 9. uses only words to represent reactants and products
  8. 10. this type of reaction always has water and carbon dioxide as products
  9. 16. can you change subscripts when balancing equations?
  10. 19. state of matter that means "dissolved in water"