how to find bond angle of vsepr theory
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Answer:
The bond angles depend on the number of lone electron pairs. For example, boron trichloride has no lone pairs, a trigonal planar shape and bond angles of 120 degrees. The trioxygen molecule O3 has one lone pair and forms a bent shape with bond angles of 118 degrees. On the other hand, O2 has two lone pairs and a linear shape. Methane, which has no lone pairs, forms a tetrahedron with 109.5-degree bond angles. Ammonia has one lone pair, creating bond angles of 107.5 degrees and a trigonal pyramidal shape. Water, with two lone pairs of electrons, has a bent shape with 104.5-degree bond angles.
The VSEPR theory assumes that each atom in a molecule will achieve a geometry that minimizes the repulsion between electrons in the valence shell of that atom. It is basically a model to predict the geometry of molecules. Mainly VSEPR models look at the bonding and molecular geometry of organic molecules and polyatomic ions.
The VSEPR model predicts the 3-D shape of molecules and ions but is ineffective in providing any specific information regarding the bond length or the bond itself.
VSEPR models are based on the concept that electrons around a central atom will configure themselves to minimize repulsion, and that dictates the geometry of the molecule.
It can predict the shape of nearly all compounds that have a central atom
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