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Xenon crystallises in face - centered cu...

Xenon crystallises in face - centered cubic , and the edge of the unit cell is 620 pm .The radius of a xenon atom is

A

`438.5` pm

B

`219.25` pm

C

`536.94` pm

D

`265.5` pm

Text Solution

Verified by Experts

The correct Answer is:
b
For fcc lattice
`4r = sqrt(2)a ` where `a = 620` pm
or , `r = (1)/(2sqrt(2)) xx a`
`= (1)/(2sqrt(2)) xx 620` pm
`= 219.20` pm
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