elements

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Across
  1. 2. two or more elements that cannot be physically separated
  2. 5. the smallest particle of matter
  3. 6. the strongest form of radiation
  4. 8. the particle with no charge in an atom
  5. 9. two or more elements that can be physically separated
  6. 10. the medium strength of radiation
Down
  1. 1. a radioactive element
  2. 3. the positively charged particle in an atom
  3. 4. the negatively charged particle in an atom
  4. 7. the weakest form of radiation