dylan crossword

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Across
  1. 3. two or more formes of the same element
  2. 6. appearing or occurring at an interval
  3. 7. a subatomic particle in all atoms
  4. 9. a neutral particle
  5. 10. a negativity charged particle
Down
  1. 1. this is the smallest unit of matter
  2. 2. the proses of sending off energy
  3. 4. a concept of atom that have a periodic number
  4. 5. a three dimensional representation of a person or thing
  5. 8. a central part of an atom