The Solid State

The Solid State

Question

Copper crystallises with face centred cubic unit cell. If the radius of a copper atom is 127.8 pm, calculate the density of the copper metal.

(Atomic mass of Cu = 63.55 u and Avogadro’s number NA = 6.02 x 1023 mol-1)

Answer

No. of atoms in unit cell, Z = 4

Radius = 127.8 pm
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