Question

An element having bcc structure has $12.08\times {10}^{23}$ unit cells. The number of atoms in these cells is:

• A. $12.08\times {10}^{23}$
• B. $24.16\times {10}^{23}$
• C. $48.38\times {10}^{23}$
• D. $12.08\times {10}^{22}$

Answer 1

Answer: (B)

$24.16\times {10}^{23}$

The $Z_{eff}$ of BCC structure $=8\times \frac{1}{8}+1=2$

In one unit cell, $2$ atoms of the given element is present.

So, in $12.08\times {10}^{23}$ unit cell, $24.16\times {10}^{23}$ atoms are present.

Option B is correct.