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Iron has body centred cubic lattice. If ...

Iron has body centred cubic lattice. If the edge length of the unit cell is 286 pm, the radius of iron atom is

A

80 pm

B

62pm

C

160 pm

D

124 pm

Text Solution

Verified by Experts

The correct Answer is:
D
Body diagonal ` = sqrt(3) xx a = sqrt(3) xx 286 = 495 ` pm
atomic radius ` = ("body diagonal")/(4) = 495/4 = ` 124 pm
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