Enigma 7

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