The world of Atoms

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Across
  1. 2. Combing capacity of an atom
  2. 6. Outermost shell of an atom
  3. 8. Discovery of Electrons
  4. 9. Discovery of Nucleus
  5. 10. Protium and Tritium
Down
  1. 1. Number of protons and neutrons
  2. 3. Number of protons
  3. 4. Negatively Charged Rays
  4. 5. Sub-atomic particle with negative charge
  5. 7. Sub-atomic particle with positive charge