\( \mathrm{How} \) many \( \mathrm{Cl}^{-} \)ions are there around \( \mathrm{Na}^{+} \)ion in \...
\( \mathrm{How} \) many \( \mathrm{Cl}^{-} \)ions are there around \( \mathrm{Na}^{+} \)ion in \( \mathrm{NaCl} \) crystal?
(A) 3
(B) 4
(C) 6
(D) 8
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