How can you use the VSEPR model to predict the shape of, and the bond angles in a molecule?

the VSEPR model utilizes electron-pair geometry (regions around the central atom) and molecular geometry (amount of lone pairs around the central atom–so whatever the electron-pair geometry is, you just count the amount of lone pairs in those regions).

Explanation:

No lone pairs around the central atom, the electron pair and molecular geometry would be the same. Bond angle differs depending on the electron pair geometry and molecular geometry you have for a molecule.

pstnonsonjoku pstnonsonjoku · Answer 2 · 2021-09-10T18:37:51+02:00

The VSEPR model is used to predict the shape of, and the bond angles in a molecule by counting the number of electron pairs on the valence shell of the central atom in the molecule.

The VSEPR model was introduced by Gillespie and Nyholm in 1957 to explain the shape of and bond angles of molecules.

The main point of the theory is that electron pairs on the valence shell of the central atoms of molecules position themselves as far apart in space as possible to minimize electron pair repulsion.

The number of electron pairs on the valence shell of the central atoms of molecules determine the shape and bond angle of the molecule.

If for instance, there are four electron pairs on the valence shell of the central atom of a molecule, the molecule is expected to be tetrahedral in shape with a bond angle of 109°.

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