The VSEPR theory is simple yet powerful. Nevertheless, like any simplified model, it has its limitations. First, although it predicts that the bond angle in H2O is less than the tetrahedral angle, it does not make any attempt to predict the magnitude of the decrease. Second, the theory makes no predictions about the lengths of the bonds, which is another aspect of the shape of a molecule. Third, it ascribes the entire criterion of shape to electrostatic repulsions between bonding pairs, when in fact there are numerous contributions to the total energy of a molecule, and electrostatic effects are not necessarily the dominant ones. Fourth, the theory relies on some vague concepts, such as the difference in repelling effects of lone pairs and bonding pairs. There also are some species for which VSEPR theory fails. Nevertheless, despite these limitations and uncertainties, VSEPR theory is a useful rule of thumb and can be used with reasonable confidence for numerous species.l
the VSEPR theory
Electron pairs
Tertahedral
Linear
VSEPR is "Valence shell electron pair repulsion".
no, not all molecules obey the VSEPR theory, there is an exeption considered for the SIO2 molecules which obeys not the VSEPR theory
How atoms are arranged in a molecule.
the VSEPR theory
VSEPR predict the geometry of a chemical molecule.
According the VSEPR theory of molecular geometry, the geometry of SCl2 would be the same as H2O which is a bent angle
Electron pairs
Electron pairs
Electron pairs
the VSEPR theory
A pyramidal molecule
VSEPR theory
linear