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JEE MainChemistryModeratePhysical Chemistry

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

Show answer and solution
In fcc unit cell 4r = 2a\sqrt{2}a [r = radius of Cu atom, a =
So
r=2a4r = \frac{\sqrt{2}a}{4}
r=2×3614=127pmr = \frac{\sqrt{2} \times 361}{4} = 127pm

Source: Grass-G / CH-28 Chemistry Paper FST 16 Jan.docx

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