what are the main postulates of VSEPR
Answers
Answer:
The main postulates of VSEPR theory are,
The shape of the molecule is determined by the repulsion between all the electron pairs.
A lone pair of electron occupies more space than bond pair.
The electrons are oriented around the central atom in such a way that the repulsion among them is minimum.
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Answer:
Explanation:
1)In polyatomic molecules (i.e. molecules made up of three or more atoms), one of the constituent atoms is identified as the central atom to which all other atoms belonging to the molecule are linked.
2)The total number of valence shell electron pairs decides the shape of the molecule.
3)The electron pairs have a tendency to orient themselves in a way that minimizes the electron-electron repulsion between them and maximizes the distance between them.
4)The valence shell can be thought of as a sphere wherein the electron pairs are localized on the surface in such a way that the distance between them is maximized.
5)The VSEPR theory can be applied to each resonance structure of a molecule.
6)The strength of the repulsion is strongest in two lone pairs and weakest in two bond pairs.
7)If electron pairs around the central atom are closer to each other, they will repel each other. This results in an increase in the energy of the molecules.
8)If the electron pairs lie far from each other, the repulsions between them will be less and eventually, the energy of the molecule will be low.
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