explain the basic principles of the VSEPR for predicting the shapes of molecules and ions
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Answer:
The basic premise of VSEPR is that pairs of electrons in the valence shell of the central atom of a molecule repel each other and take up positions as far apart as possible. ... In order to predict the basic shape of a molecule or ion by VSEPR.
The Basic principle of the VSEPR for predicting the Shapes of Molecules :
The following steps must be followed in order to decide the shape of a molecule !
● The least electronegative atom must be selected as the central atom (since this atom has the highest ability to share its electrons with the other atoms belonging to the molecule) .
● The total number of electrons belonging to the outermost shell of the central atom must be counted .
● The total number of electrons belonging to other atoms and used in bonds with the central atom must be counted .
● These two values must be added in order to obtain the valence shell electron pair number or the VSEP number .