Copper crystallizes in fcc with a unit cell length of 361 ±.... | Chemistry | SolveeIt

Copper crystallizes in fcc with a unit cell length of 361 pm. What is the radius of copper atom ?

$108\, pm$

$127\, pm$

$157\, pm$

$181\, pm$

Answer

$127\, pm$

Explanation

For FCC, $\sqrt{2}a=4r$ (the atoms touches each other along the face- diagonal) $r=\frac{\sqrt{2}a}{4}=\frac{\sqrt{2}\times361}{4}$ $=127\,pm$

Chemistry Question on The solid state