Chemical Reactions and The Law of Conservation of Mass

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Across
  1. 1. A number that shows how many molecules or atoms are involved in a reaction.
  2. 4. A reaction that absorbs heat from the surroundings.
  3. 5. The smallest unit of an element.
  4. 6. Type of reaction where substances combine to form a more complex compound.
  5. 7. Equation A shorthand way to show a chemical reaction using symbols.
  6. 10. Reaction A change in matter that produces one or more new substances.
  7. 12. A chemical reaction where a compound breaks into simpler substances.
  8. 13. Visible sign of a chemical change, like bubbling.
  9. 14. The new substances formed in a chemical reaction.
Down
  1. 2. A reaction that releases heat.
  2. 3. of Mass The principle stating that matter is not created or destroyed.
  3. 5. Energy Energy required to start a chemical reaction.
  4. 8. A force that holds atoms together in a compound.
  5. 9. Substances present before a chemical reaction occurs.
  6. 11. Two or more substances mixed but not chemically combined.