試題詳解

27. Draw the Lewis structures of the molecules below, and use them to answer the following questions. How many of the molecules have no dipole moment?

 I: BH₃, II: NO₂, III: SF₆, IV: O₃, V: PC1₅
(A) 1
(B) 2
(C) 3
(D) 4
(E) they are all polar