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Across
  1. 2. electric current is passed through a substance to effect a chemical change
  2. 6. a small number or letter written slightly below the normal line of text, usually used in chemical formulas to indicate the quantity of atoms of a specific element present in a molecule
  3. 7. takes part in chemical reaction, on left side of arrow
  4. 9. a thing that is composed of two or more separate elements/ a mixture
  5. 10. A substance that cannot be decomposed into simpler substances by ordinary chemical processes.
Down
  1. 1. a group of atoms bonded together
  2. 3. constant term related to the properties of a product
  3. 4. the substances that are formed as a result of a chemical reaction
  4. 5. the measure of how much stuff is in an object
  5. 8. the basic unit of a chemical element.