Question

An element with molar mass 2.7 × 10^–2 kgmol^–1 forms a cubic unit cell with edge length 405 pm. If its density is 2.7 × 10³ kgm^–3, the radius of the element is approximately ____ × 10^–12 m (to the nearest integer).

Answer 1

143

3.98 = z 

z \(\approx\) 4  structure is fcc