chemistry

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Across
  1. 2. positively charged subatomic particle
  2. 3. number of protons
  3. 6. negatively charged subatomic particle
  4. 8. a mixture of different compounds
  5. 9. smallest part of an element
  6. 10. a substance with the same number of protons
Down
  1. 1. number of protons and neutrons
  2. 4. two or more atoms chemically bonded together
  3. 5. two or more elements chemically combined together in a fixed ratio
  4. 7. neutrally charged subatomic particle