Question

An element having bcc geometry has atomic mass $50$. Calculate the density of the unit cell, if its edge length is $290$ pm.

Answer 1

$density=\frac{Z\times M}{a^3\times N_A}$

$density=\frac{2\times 50}{(290\times {10}^{-10}{)}^3\times 6.022\times {10}^{23}}$

$=6.81g/c{m}^3$