Test111

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Across
  1. 1. matter that flows freely but has a fixed volume
  2. 5. subatomic particle with a positive electric charge
  3. 7. subatomic particle with no electric charge
  4. 10. wave radiation that is very difficult to stop
  5. 11. subatomic particle with a charge of negative electricity
Down
  1. 2. an element with a different number of neutrons to its atom
  2. 3. an element with a different number of electrons to its atom
  3. 4. particle radiation that is stopped easily (large particles)
  4. 6. particle radiation that is not stopped
  5. 8. the smallest particle of a chemical element that can exist
  6. 9. matter that is stable and firm in shape
  7. 10. matter that expands to fill an area