Question

The metal calcium crystallizes in F.C.C unit cell with a = 600 pm. The density of metal if it contains $0.2\%$ schottky deficits.

• A. 1.22 g/cc
• B. 5 g/cc
• C. 20 g/cc
• D. 50 g/cc

Answer 1

The correct option is A

1.22 g/cc

Due to Schottky defects number of atoms decreases,
$Z=4-4\times \frac{0.2}{100}=3.992$
Applying, $\rho =\frac{Z\times M}{a^3\times N_0}$ we get 1.22 g/$c{m}^3$