Module 1 Test Review

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Across
  1. 2. Two or more atoms chemically bonded together
  2. 4. What goes into a chemical reaction (found on the left side of the arrow)
  3. 5. The element that makes up the majority of the Earth's crust and human body
  4. 9. Chemical equations must have an equal number of atoms on each side in order to be _________.
  5. 10. The smallest piece of a compound that can exist
  6. 11. The most important compound on planet Earth
Down
  1. 1. Elements _____ through various Earth systems
  2. 3. The element that makes up 78% of the air we breathe
  3. 6. The subatomic particle that is important for chemical bonding
  4. 7. The chemical formula for table salt
  5. 8. What the arrow in a chemical reaction points to