Question

which of the following ions have a complete valence-shell octet? B+, I-, Ca2+, or Pb2+

which of the following ions have a complete valence-shell octet?

B+, I-, Ca2+, or Pb2+

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Answer #1

B3+

Electronic configuration = [He]

Number of valence electrons = 0

B3+has a complete valence-shell octet

I-

Electronic configuration = [Kr] 4d10 5s2 5p6

Number of valence electrons = 8

I- has a complete valence-shell octet

Ca2+

Electronic configuration = [Ar]

Number of valence electrons = 0

Ca2+ has a complete valence-shell octet

Pb2+

Electronic configuration = [Xe] 4f14 5d10 5s2

Number of valence electrons = 2

Pb2+ does not possess a complete valence-shell octet

Answer: B3+, I- , Ca2+

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