NEET Questions Solved


Copper metal has a face-centred cubic structure with the unit cell length equal to 0.361nm. Picturing copper ions in contact along the face diagonal. The apparent radius of a copper ion is-

1. 0.128

2. 1.42

3. 3.22

4. 4.22

(A) For a face-centred cube, we have.

radius = 2a/4 = 2x0.361/4 nm = 0.128

Difficulty Level:

  • 60%
  • 24%
  • 13%
  • 5%