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Lithium metal crystallises in a body-cen...

Lithium metal crystallises in a body-centred cubic crystal. If the length of the side of the unit cell of lithium is 351 pm, the atomic radius of lithium will be

A

151.98 pm

B

75.55 pm

C

300.05 pm

D

240.80 pm

Text Solution

Verified by Experts

The correct Answer is:
A
Since Li crystallises in body-centred cubic crystal,
atomic radius, `r =(sqrt3a)/4` (a=edge length)
`:. r= sqrt3/4 xx351 = 151.98` pm (given a = 351 pm).
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