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Which one of the following elements is unable to form MF6^3– ion ?

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+1 vote
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in Chemistry by (150k points)

Which one of the following elements is unable to form MF63– ion ?

(1) Ga 

(2) AI 

(3) B 

(4) In

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2 Answers

+2 votes
by (87.3k points)

(3) MF6–3
Boron belongs to 2nd period and it does not have vacant d-orbital.

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by (20.4k points)

Boron does not BF63− due to absence of vacant d orbital B = 1s2 2s2 2p1

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