Describe the shape of each molecule in question 1.
In this problem, we must determine the geometry of different molecules by the VSEPR model.
The valence electron shell repulsion (VSEPR) model predicts the geometry of various molecules assuming that the bonding (to a lesser extent) and non-bonding (to a greater extent) pairs repel one another. As a result, these electrons strive to move as far as possible from one another, ensuring that the repulsion will be minimized among the atoms and lone pairs. This can happen in various ways and determining the number of bonding and lone pairs attached to the central atom enables us to determine the approximate geometry of the molecule. Note that the extent of repulsion is independent from the bond order.