
Concept explainers
Interpretation:
The shape that most closely describes
Concept Introduction:
VSEPR or valence shell electron pair repulsion theory predicts shape of the molecules with use of arrangement of electrons around central metal atom. Its postulates are as follows:
1. The shape of molecules is governed by repulsion between electron pairs situated in outermost or valence shell of the atoms.
2. A distortion is observed in the shape of the molecules if lone pairs are present in it. These are electron pairs that do not participate in
3. The order of repulsion of electron pairs is as follows:
4. Multiple bonds create more repulsion as compared to single bonds.
5. The following table shows various molecular shapes that match to different number of electron pairs:
The geometry of the molecule is predicted with the help of steric number. The formula to calculate the steric number is as follows:
The least electronegative atom is usually taken to be the central atom.

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Chapter MS Solutions
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