NEET Chemistry The Solid State 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 = $\sqrt{2}$a/4 = $\sqrt{2}$x0.361/4 nm = 0.128

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