Biggest crossword ever

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Across
  1. 3. A reaction that releases heat
  2. 8. Which Pokemon was the first to ever be created
  3. 9. Who was the first actor to play Spiderman
  4. 11. Which Pokemon is the most popular
  5. 12. The most reactive halogen
  6. 15. Who was the third actor to play spiderman
  7. 16. Who wrote Macbeth
  8. 18. Who wrote A Christmas Carol
  9. 19. "Is that a ______ I see before me"
  10. 20. The first man on the moon
Down
  1. 1. What is Mr Ripley's first name in the novel "The Talented Mr Ripley"
  2. 2. It's makes up 78% of the air we breath
  3. 4. A reaction the takes in heat
  4. 5. Which pokemon has the highest defense stats
  5. 6. "Solitary as an ______"
  6. 7. Who was the first person Mr Ripley killed in "The Talented Mr Ripley"
  7. 10. "I don't play ____"
  8. 13. Who was the second actor the play spiderman
  9. 14. Leonardo Da Vinci most famous painting
  10. 17. Who is classed "The god of all Pokemon"