In which of the following species central atom is NOT surrounded by exactly 8 valence electrons?...

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In which of the following species central atom is NOT surrounded by exactly 8 valence electrons?
(a) \( \mathrm{BF}_{4}^{-} \)
(b) \( \mathrm{NCl}_{3} \)
(c) \( \mathrm{PCl}_{4}^{+} \)
(d) \( \mathrm{SF}_{4} \)
\( \mathrm{P} \)
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