17. -16 points Zumlntro7 12 P079. My Notes Ask Your Te For the indicated atom in

Question

17. -16 points Zumlntro7 12 P079. My Notes Ask Your Te For the indicated atom in each of the following molecules or ions, give the number and arrangement of the electron pairs around that atom. (a) As in As043 number arrangement O linear O bent O trigonal planar O square planar O tetrahedral (b) Se in Se042 number arrangement O linear O bent O trigonal planar O square planar tetrahedral (c) S in H29S number arrangement linear O bent O trigonal planar O square planar O tetrahedral Need Help? eit Watch t Submit Answer Save Progress

Explanation / Answer

Number and geometry

(a) As in AsO4^3-

Number = 0

Arrangement : tetrahedral

no lone pair, As is all bonded by 4 oxygen

(b) Se in SeO4^2-

number = Tetrahedral

hybridization of central Se is sp3

(c) S in H2S

number = 2 lone pair

lone pairs push other atoms closer

arrangement : bent

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