Question

A metal crystallizes in foc lattice and edge of the unit cell is 620pm. The radius of metal
atom is
(a) 265.5 pm
(b) 310 pm
(c) 219.2 pm
(d) 438.6 pm​

Answer 1

Answer:

The nearest neighbor distance would be

2

a

=

2

620

=438.4 pm

2. In FCC 4r=a

2

(along the face diagonal)

r=

2

2

a

==

2

2

620

=219.2 pm