Problem: In determining electron geometry, why do we consider only the electron groups on the central atom? In other words, why don’t we consider electron groups on terminal atoms? Explain.

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We have to explain why only the electron on the central atom are taken into account when determining the electron geometry of the molecule.


The electron geometry around an atom in a molecule can be determined by counting how many electron groups (bond pairs and lone pairs) are around an atom.

The preferred geometry of a molecule is the one in which the electron groups around the central atom have the maximum separation.

The geometry with the lowest energy is the one where the repulsion is minimized.

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In determining electron geometry, why do we consider only the electron groups on the central atom? In other words, why don’t we consider electron groups on terminal atoms? Explain.

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