The formula for the determination of the density of a unit cell is:
- A$\frac{a^3 \times N_A}{Z \times M} \ g \ cm^{-3}$
- B$\frac{Z \times M}{a^3 \times N_A} \ g \ cm^{-3}$
- C$\frac{a^3 \times M}{Z \times N_A} \ g \ cm^{-3}$
- D$\frac{M \times N_A}{a^3 \times Z} \ g \ cm^{-3}$
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If the edge length of a cubic unit cell in a $bcc$ structure is $400 \, pm$, then the atomic radius of the metal will be ........... $pm$.
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