Perfect 1o

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Across
  1. 1. - A material that increases the rate of a reaction by lowering the activation energy
  2. 6. Reaction - A reaction that releases energy in the form of heat
  3. 9. - a substance that takes part in and undergoes change during a reaction.
  4. 12. - A chemical reaction that breaks down compounds into simpler products
  5. 13. - A solid that forms from a solution during a chemical reaction
  6. 14. Reaction - A reaction that absorbs energy in the form of heat.
  7. 15. Energy - The minimum amount of energy needed to get a chemical reaction started
Down
  1. 2. - A chemical reaction in which two or more simple substances combine to form a new, more complex substance
  2. 3. - A substance that is formed as result of chemical reaction
  3. 4. Reaction - a process that involves rearrangement of the molecular or ionic structure of a substance, as opposed to a change in physical form or a nuclear reaction.
  4. 5. - A reaction in which one element replaces another in a compound or when two elements in different compounds trade places
  5. 7. system - A system in which matter can enter from or escape to surroundings
  6. 8. - Coefficient: A number in front of a chemical formula in an equation that indicates how many molecules or atoms of each reactant and product are involved in a reaction.
  7. 10. - A material that decreases the rate of reaction
  8. 11. of Mass - The principle stating that matter is not created or destroyed during a chemical reaction