Enigma 7

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Across
  1. 1. An apple fell on his head
  2. 3. Known for researchs on electricity
  3. 7. To be or not to be ?
  4. 8. E=mc²!
  5. 9. Father of the atomic bomb
Down
  1. 2. French Emperor
  2. 4. I had a dream.
  3. 5. Discovered the RX
  4. 6. Famous scientist and painter from Renaissance