Law of Conservation of Mass

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Across
  1. 2. The numbers behind chemical symbols
  2. 5. and environment where matter can enter or escape
  3. 7. A chemical equation with the same number of atoms in each element on the sides of the equation
  4. 9. a part or aspect of something abstract, especially one that is essential or characteristic.
  5. 10. A group of atoms bonded together is a _______
  6. 13. _________ are what you have at the end of a chemical reaction
  7. 14. when the total mass of the reactant is equal to the mass of the product the equation is _________
  8. 16. Mass can also be called ________
  9. 17. during a chemical reaction matter cannot be created or destroyed
  10. 19. 2 or more substances combine to form a new compound
Down
  1. 1. 1 element replaces another element in a compound
  2. 3. The substances present before the reaction occurs
  3. 4. Mass cannot be _________ or destroyed
  4. 6. an environment where matter cannot enter or escape
  5. 8. burning wood, rust, campfire are examples of a
  6. 9. A chemical reaction that requires heat
  7. 11. a single unit of a pure substance, or "element".
  8. 12. a compound decomposes into 2 or more simpler substances
  9. 15. The numbers in front of chemical symbols
  10. 18. What does the arrow mean in a chemical equation?