Propylene 3D Molecular Model — CAS 115-07-1

Propylene (C3H6, CAS 115-07-1) — a free educational 3D molecular model for teachers and students, by MolGod.org. No legend required: the element symbol is engraved on each atom. No ring closes anywhere in Propylene, which makes it a good open-chain example: 9 atoms, 8 bonds, 7 single and 1 double. Hand the model round and let students tally the engraved atoms: 3 C + 6 H, 9 in total. Name-and-locate exercise: students find the carbon-carbon double bond (C=C) on the model and afterwards write the…

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