Lithium metal crystallizes in a body-centred cubic crystal. If the length of the side of the unit cell if lithium is 351 pm, the atomic radius of the lithium will be
A) 300.5 pm-
B) 240.8 pm
C) 151.8 pm
D) 75.5 pm
Correct Answer:
C
Solution :
For bcc \[r=\frac{\sqrt{3}a}{4}=\frac{\sqrt{3}}{4}\times 351=151.98\,pm\]