IGNOU MCH 11 2026 2027 - Give the second postulate of VSEPR theory. Predict at the structure of

Question

Give the second postulate of VSEPR theory. Predict at the structure of the molecule
sulfur tetrafluoride with the help of VSEPR theory. Draw the structure.

05 Aug 2026

Answer :

Word Count : 464

The second postulate of VSEPR (Valence Shell Electron Pair Repulsion) theory states that the electron pairs present in the valence shell of the central atom arrange themselves in such a way that the repulsions between them are minimum. Thus, electron pairs occupy positions as far apart from one another as possible. The extent of repulsion depends upon the nature of the electron pairs. A lone pair occupies more space around the central atom than a bonding pair because it is attracted by only one nucleus. Therefore, the order of repulsions is: Lone pair–lone pair > lone pair–bond pair > bond pair–bond pair. This principle is useful in predicting the molecular shape of sulfur tetrafluoride (SF₄). In SF₄, sulfur is the central atom. Sulfur has atomic number 16 and its valence-shell

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