The drawings preceding WorkPatch 6.2 give the ideal values for the bond angles in the molecules. Recalling that there is roughly a 2° compression from the ideal VSEPR angle for every lone pair on the central atom, give a more accurate bond angle for each molecule.

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Water H ~109.5° H Four electron groups are arranged tetrahedrally around the oxygen atom. Ozone ~120° Three electron groups are arranged around the oxygen atom in a planar triangle.