Final answer:In KrBr2, there arefiveelectron domains (two bonding pairs, three lone pairs) surrounding the central Kr atom leading to a trigonal bipyramidal electronic geometry; however, the actual molecular geometry is linear due to the presence of the lone pairs distorting the shape.Explanation:In the molecule KrBr2, there are a total of five electron domains surrounding the central Kr atom; there are two bonding pairs and 3 lone pairs. To determine the molecular geometry, first, you draw the Lewis structure to visualize the electron domains. As per theoctet rule, most atoms aim to have eight electrons in their valence shell, but Kr is an exception to the rule as it can have more than eight electrons due to its capacity to expand its octet.The electron groups around the central atom are directed toward the corners of a trigonal bipyramid. However, since there are lone pairs, the actual molecular geometry must account for the repulsion they cause. The three lone pairs are positioned equatorially to minimize repulsion, which distorts the geometry. After considering the lone pairs, the molecular geometry around the central atom islinear....

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