Science is fun!

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Across
  1. 5. A positively charged subatomic particle
  2. 6. A subatomic particle that has no charge
  3. 7. The distance between two crests
  4. 9. A negatively charged subatomic particle
  5. 10. The basic unit of a chemical element
Down
  1. 1. The largest planet in our solar system
  2. 2. The bottom of a wave
  3. 3. The center of our solar system
  4. 4. The Earth makes on of these every 24 hours
  5. 8. The top of a wave