Interpretation:
The molecular model that doesn’t have a tetrahedral central atom in the given molecular models is to be identified.
Concept introduction:
Molecular shape can be predicted from the Lewis structure by using the valence-shell Electron-pair repulsion (VSEPR) model.
-Count the number of valence electron pairs (bond pairs and lone pairs).
-Assume that the valence electron pairs form a structure that allows them to be as far away from each other as possible.
-If there are only two bond pair electrons, the molecule is linear.
-If there are three bond pair electrons, the molecule is shaped like a trigonal planar.
-If there are four bond pair electrons, the molecule is shaped as a regular tetrahedral.
- Repulsion between lone pair-bond pair of electrons effect the geometry of molecules.
Bond angle is the angle between two bonds of a molecule and it is determined based on the geometry.
[Bond angles:
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