Trigonal Planar Molecular Geometry Model

SKU: 68823W

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Explore trigonal planar molecular geometry with the Indigo® VSEPR set. Visualize 120° bond angles and electron pair repulsion in AX3 structures.

The Indigo® Molecular Geometry VSEPR Set includes two models that demonstrate trigonal planar geometry. One represents a central atom surrounded by three bonded pairs (AX3), while the other shows two bonded pairs and one lone pair (AX2E). Each model illustrates the 120° bond angles typical of molecules like BF3 and SO3, showing how bonding and lone pairs distribute themselves evenly in a single plane.

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Details

Learning Outcomes Table

Learning Outcome Activity Concept Reinforced Curricular Link
Identify trigonal planar geometry and bond angles. Build a central atom with three bonded pairs (AX3) using the kit. Electron domains repel to form 120° angles in a single plane. High school chemistry: molecular geometry basics.
Model the effect of a lone pair on bond angles. Substitute one bonded pair with a lone pair to create AX2E. Lone pairs increase repulsion, bending the molecule. Introductory college chemistry: VSEPR theory & bond repulsion.
Relate shape to hybridization and molecular reactivity. Compare sp2 hybridization in BF3 and CH3O models. Planar geometry facilitates π-bond formation and reactivity. Organic chemistry foundations: bonding and structure.
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Parts
P/NDescriptionQTY
68186-20Wobbly bond, 20mm, each50
68216CAtom, Orbit, H "a", white, 1 prong20
68221CAtom, Orbit, Cl "a", green, 1 prong30
68225CAtom, Orbit, C "b", 180 degree, black1
68241CAtom, Orbit, C "j", planar: 120-120-120, black2
68244CAtom, Orbit, C "k", tetrahedral, black3
68258CAtom, Orbit "l", octahedral, grey5
68259CAtom, Orbit, C "m", trigonal bipyramidal, black4
68416COrbital for showing lone electron pair, white, Orbit style10
68417COrbital for showing lone electron pair, black, Orbit style10
Specifications

The parts listed on this page are for the entire kit, not the molecules(s) shown. You can augment this geometry with additional pieces listed on the Orbit Components page.

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