01. THE SOLID STATE (HM)
Explanation:
(d) \(bcc\) के लिये \(d = \frac{{\sqrt 3 }}{2}a\) या \(a=\frac{2d}{\sqrt{3}}=\frac{2\times 4.52}{1.732}\) \(=5.219\,\,\overset{o}{\mathop{\text{ }A}}\,\,\,=522\,\,pm\)
\(P = \frac{{Z \times M}}{{{a^3} \times {N_0} \times {{10}^{ - 30}}}}\)\( = \frac{{2 \times 39}}{{{{(522)}^3} \times (6.023 \times {{10}^{23}}) \times {{10}^{ - 30}}}}\)
\( = 0.91\,g/c{m^3} = 910\,kg\,{m^{ - 3}}\)