Answer:
valence shell electron pair conversion theory (VSEPR)
Step-by-step explanation:
The theory of the repulsion of the electronic pairs of the valence layer (VSEPR) Unlike the ionic bond, the covalent bond is directional. The shape of a molecule explains an essential part of its properties. The theory of the repulsion of the electronic pairs of the valence layer (VSEPR) makes a simple addition to Lewis's ideas that allows us to foresee the shape of a given molecule: “The electronic pairs repel each other, so that they place as far as possible from each other. ”