Unit 2 Vocabulary Practice

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Across
  1. 2. substance(s) resulting from a chemical reaction.
  2. 4. the number written to the right and slightly below an element in a chemical formula; represents the number of atoms of an element.
  3. 5. Change, the formation of a new substance with different properties.
  4. 9. Change, a change that occurs but does not change the substance chemically; can be undone.
  5. 11. a pure substance that cannot be broken down chemically into simpler substances.
  6. 12. Substances that are combined and changed during a chemical reaction.
  7. 13. Reaction, a change caused by the interaction of two or more substances (reactants) resulting in the formation of new substances (products).
Down
  1. 1. the formation of solids from 2 liquids.
  2. 3. combined atoms of the same element.
  3. 5. the number placed in front of a chemical formula in a chemical equation; represents the number of molecules of that substance.
  4. 6. a substance made of two or more elements.
  5. 7. of Conservation of Mass, matter is not created or destroyed; only rearranged.
  6. 8. Formula, a representation of a molecule or compound in which elements are represented by symbol and subscripts.
  7. 10. Equation, a representation of a chemical reaction by symbols and numbers.