If r is the radius of an atom and a is an edge length of fcc unit cell, then
A. r = \(\frac{\sqrt{3}}{4} a\)
B. r = \(\frac{a}{2 \sqrt{2}}\)
C. r = \(\frac{a}{2}\)
D. r = \(2 \sqrt{2} a\)
Answer:B
If r is the radius of an atom and a is an edge length of fcc unit cell, then
A. r = \(\frac{\sqrt{3}}{4} a\) B. r = \(\frac{a}{2 \sqrt{2}}\) C. r = \(\frac{a}{2}\) D. r = \(2 \sqrt{2} a\)