chemistry unit

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Across
  1. 4. substance formed as a result of a chemical reaction
  2. 5. Horizontal row on the periodic table where all elements have the same number of energy levels
  3. 8. subatomic particle with a negative electrical charge
  4. 9. whether or not a substance will undergo a chemical change
  5. 10. the smalles part of a chemical element
  6. 11. subatomic particle with a neutral electrical charge located in the nucleus
Down
  1. 1. shows how many atoms of an element are present in a molecule
  2. 2. column of elements on the periodic table with similar properties Family
  3. 3. number in front of a symbol that represents the number of molecules present
  4. 6. subatomic particle with a positive electrical charge located in the nucleus
  5. 7. substance that cannot be broken down or changed