Question

An element (atomic mass = 100 g/mol) having bee structure has unit cell edge 400 pm. Then density of the element is

(a) 10.376 g/cm³

(b) 5.188 g/cm³

(c) 7.289 g/cm³

(d) 2.144 g/cm³

Answer 1

Correct option is (b) 5.188 g/cm³

Density = 100 × 2/6.02 x 10²³ x (400 × 10^-10)³ g cm^-3