Chemistry reaction mechanisms

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Across
  1. 2. where a small molecule is removed forming a double bond
  2. 5. breaking where one electron goes to each atom
  3. 7. that donates an electron pair
  4. 13. of electrons or decrease in oxidation state
  5. 15. a bond using water
  6. 18. that speeds up a reaction without being used up
  7. 19. a reaction while preventing loss of reactants
  8. 20. state during a reaction step
  9. 21. where one atom or group is replaced by another
Down
  1. 1. used to separate products based on boiling point
  2. 3. where radicals combine and the reaction stops
  3. 4. charged carbon intermediate
  4. 6. that accepts an electron pair in a reaction
  5. 8. in radical substitution that sustains the chain reaction
  6. 9. where atoms add across a double bond
  7. 10. breaking where both electrons go to one atom
  8. 11. used to show movement of electron pairs
  9. 12. energy required for a reaction to occur
  10. 14. of electrons or increase in oxidation state
  11. 16. reactive species with an unpaired electron
  12. 17. step in free radical substitution forming radicals