In which of the following molecules does the | vedclass

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(B) The octet rule states that atoms tend to gain,lose,or share electrons to achieve a stable configuration of $8$ electrons in their valence shell.In

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$BF_3$

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(B) The octet rule states that atoms tend to gain,lose,or share electrons to achieve a stable configuration of $8$ electrons in their valence shell.In $BF_3$,the central Boron atom is bonded to $3$ Fluorine atoms.Each $B-F$ bond consists of $2$ shared electrons,resulting in a total of $3 	imes 2 = 6$ electrons in the valence shell of Boron.Since $6 < 8$,the central Boron atom in $BF_3$ does not follow the octet rule (it is an electron-deficient molecule).

In which of the following molecules does the central atom not follow the octet rule?

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