Science Chemical reactions

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Across
  1. 2. smallest unit of matter
  2. 5. positive charge; located in the nucleus
  3. 6. after a chemical reaction(on the left side)
  4. 7. different on each side
  5. 10. located in the middle of a atom
Down
  1. 1. same on each side
  2. 3. anything that takes up space with weight
  3. 4. before a chemical reaction(on the right side)
  4. 8. neutral charge; located in the nucleus
  5. 9. negative charge; located in the "rings" outside of the nucleus