Step-by-step explanation:
The Lewis electron-pair approach can be used to predict the number and types of bonds between the
atoms
in a substance, and it indicates which
atoms
have lone pairs of electrons. This approach gives no information about the actual arrangement of
atoms
in space, however. We continue our discussion of structure and bonding by introducing the valence-shell electron-pair repulsion (VSEPR) model (pronounced “vesper”), which can be used to predict the shapes of many molecules and
polyatomic ions
. Keep in mind, however, that the VSEPR model, like any model, is a limited representation of reality; the model provides no information about bond lengths or the presence of multiple bonds.