S2I6 E 1&2 Chemical Reactions Vocabulary

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Across
  1. 2. A chemical change in which one element replaces a second element in a compound.
  2. 5. A chemical equation that does not indicate the relative amounts of the reactants and products.
  3. 6. For a typical chemical reaction, the mass of the products is always equal to the mass of the reactants.
  4. 10. For a typical chemical reaction, energy is neither created nor destroyed.
  5. 13. A chemical change in which two or more substances react to form a single new substance.
  6. 15. Bonds are broken when molecules collide with enough energy.
  7. 16. Reactions that release net energy into the surroundings.
  8. 17. A compound composed of hydrogen and carbon.
  9. 18. A chemical change in which an element or a compound reacts with oxygen.
Down
  1. 1. Lists the relative reactivities of elements within groups, such as metals and halogens.
  2. 3. The speed at which reactants become products.
  3. 4. Substances present before a reaction.
  4. 7. A chemical change involving an exchange of positive ions between two compounds.
  5. 8. The numbers in front of terms used to balance and equation so it obeys the las of conservation of mass.
  6. 9. A chemical change in which a single compound breaks down into two or more products.
  7. 11. The energy stored in the chemical bonds of a substance.
  8. 12. Reactions that absorb net energy from the surroundings.
  9. 14. Substances present after a reaction.