Matter & Energy

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Across
  1. 2. Elements in the same vertical column of the periodic table also called a family
  2. 6. A negatively charged particle that orbits the nucleus of an atom
  3. 8. Region surrounding the nucleus in which the electrons move about
  4. 9. A subatomic particle that has no charge and that is found in the nucleus of an atom
  5. 10. A substance formed as a result of a chemical reaction
  6. 11. The measure of how much matter is in an object
Down
  1. 1. The electrons that are farthest away from the nucleus of an atom and are involved in chemical reactions
  2. 3. A subatomic particle that has a positive charge and that is found in the nucleus of an atom
  3. 4. An atom's central region, which is made up of protons and neutrons
  4. 5. A substance that enters into a chemical reaction
  5. 7. A horizontal row of elements in the periodic table