Chemistry Carols

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Across
  1. 4. I'm dreaming of a white ___
  2. 5. Chemistry __, chemistry __/isn't it a blast/Oh what fun it is to take/a chemistry __ and pass.
  3. 7. Walking in a __ wonderland
Down
  1. 1. The __ coming to town
  2. 2. Iron the red atom __ you'll go down in Chemistry!
  3. 3. Silent __, difficult __
  4. 6. Oh, __! Oh, __!