Which of the ions is not having the configuration of \( \mathrm{Ne} \) ? (a) \( \mathrm{Cl}^{-} ...

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Which of the ions is not having the configuration of \( \mathrm{Ne} \) ?
(a) \( \mathrm{Cl}^{-} \)
(b) \( \mathrm{F}^{-} \)
(c) \( \mathrm{Na}^{+} \)
(d) \( \mathrm{Mg}^{2+} \)
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