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Q.

Atomic radius of Polonium is 200 pm. It has simple cubic structure. Edge length of Polonium unit cell is

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a

50 pm

b

100 pm

c

200 pm

d

400 pm

answer is D.

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Detailed Solution

For a simple cubic unit cell,

$r = \frac{a}{2}; a = 2 r = 2 \times 200 pm = 400 pm$

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Atomic radius of Polonium is 200 pm. It has simple cubic structure. Edge length of Polonium unit cell is