CROSSWORD with Physicists

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Across
  1. 3. Quantum theory
  2. 5. Theory of magnetism
  3. 8. Discovered the electron
Down
  1. 1. Discovery of radio activity
  2. 2. Work in magnetism and electricity
  3. 4. Three laws of motion
  4. 6. Relativity
  5. 7. Theory of atomic structure