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Sodium metal crystallises in body centre...

Sodium metal crystallises in body centred cubic lattic with cell edge `4.29 Å` .What is the radius of sodium atom ?

A

`18.6 overset(@)A`

B

`1.86overset(@)A`

C

`1.86`pm

D

1860pm

Text Solution

Verified by Experts

The correct Answer is:
B
`4r=sqrt(3)arArr r=(sqrt(3)a)/(4)=(1.732xx4.29)/(4)=1.86overset(@)A` .
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