Chem crossword

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Across
  1. 2. Hangs by the fire
  2. 5. MgSO4
  3. 7. Door decoration with holly
  4. 8. Twinkling decorations
  5. 10. molecular shape
Down
  1. 1. electron geometry
  2. 3. Festive songs
  3. 4. AX3
  4. 6. compound with h
  5. 9. Jolly gift-giver