Question

Sodium crystallizes in bcc arrangement with the interfacial seperation

Answer 1

Here,Z=2(bcc)al

a=53×2=106pm=(106×10^-10)cm

M=58.5 g/mol.

D=MZ/N a^3=58.5×2/6.022×10^23×(106×10^-10)

=117/0.72=162.5 g/cc..