A. The Lewis diagram for SeH2 is: The electron-pair geometry around the Se atom in Sellz is Tetrahedral There are 2lone pairs) around the central atom, so the geometry of Seli is VShape H-Se-IH B. The Lewis diagram for BF4 is: F-B-F: The electron-pair geometry around the B atom in BF4 is There are lone pairs) around the central atom, so the geometry of BFs is
