The unit cell of a \( \mathrm{NaCl} \) lattice (a) Is body centred cube (b) Has \( 3 \mathrm{Na}...

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The unit cell of a \( \mathrm{NaCl} \) lattice
(a) Is body centred cube
(b) Has \( 3 \mathrm{Na}^{+} \)ions
(c) Has \( 4 \mathrm{NaCl} \) units
(d) Is electrically charged
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