Lithium forms body centred cubic structure

• States Matter

Lithium forms body centred cubic structure. The length of the side of its unit cell is 351 pm. Atomic radius of the lithium will be

1. 75 pm
2. 152 pm
3. 240 pm
4. 300 pm

Answer

For BCC, 

√3a = 4r

The correct option is B.