CrossWord Puzzle

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Across
  1. 5. /is an electron that is associated with an atom
  2. 6. / a substance that takes part in and undergoes change during a reaction
  3. 7. /column of elements in the periodic table
  4. 8. / no net electric charge and a mass slightly larger than that of a proton
  5. 10. /a substance that is formed as the result of a chemical reaction
Down
  1. 1. /the central and most important part of an object, movement, or group, forming the basis for its activity and growth
  2. 2. /a stable subatomic particle with a charge of negative electricity
  3. 3. /a subatomic particle with a positive charge
  4. 4. /describe where electrons are when they go around the nucleus of an atom
  5. 9. /large body of matter with no definite shape
  6. 10. / name given to a horizontal row of the periodic table