At room temperature, sodium crystallizes in a body centered cubic lattice with a = 4.24 . The theoretical density of sodium (At. mass of Na = 23) is ___.
(A) 1.002 g cm–3
(B) 2.002 g cm–3
(C) 3.002 g cm–3
(D) 4.002 g cm-3
Correct option: (A) 1.002 g cm–3
Explanation:
Cell length, a = 4.24 = 4.24 x 10-10 m
= 4.24 x 10-8 cm
In bcc lattice, z = 2, M = 23 g mol-1
