Vanillin 3D Molecular Model — CAS 121-33-5

Vanillin (C8H8O3, CAS 121-33-5) — a free educational 3D molecular model for teachers and students, by MolGod.org. Instead of colour coding, every sphere carries its engraved element symbol. Look at the skeleton first: Vanillin contains one aromatic 6-membered ring, and students can trace 19 bonds (12 single, 1 double and 6 aromatic, drawn in Kekulé form). Give each pair of students the model and a blank sheet: recording every engraved symbol should lead them to 8 C + 8 H + 3 O, which is 19 atom…

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