Naphthalene 3D Molecular Model — CAS 91-20-3

Naphthalene (C10H8, CAS 91-20-3) — a free educational 3D molecular model for teachers and students, by MolGod.org. Every atom carries its engraved element symbol (C, H, O, N...), so no colour key is needed. Start with the ring system: Naphthalene has two 6-membered rings, fused along a shared edge, both aromatic; in total the model carries 19 bonds (8 single and 11 aromatic, drawn in Kekulé form). Give each pair of students the model and a blank sheet: recording every engraved symbol should lea…

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