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Sodium has body centred packing. Distanc...

Sodium has body centred packing. Distance between two nearest atoms is `3.7 Å`. The lattice parameter is

A

`6.8 Å`

B

`4.3 Å`

C

`3.0 Å`

D

`8.6 Å`

Text Solution

Verified by Experts

The correct Answer is:
B
Neighbour disatance of a body centred cubic cell `d=(sqrt(3))/2a`, where `a` is the lattice parameter.
`implies 3.7=(sqrt(3a))/2`
or `a=(2xx3.7)/(sqrt(3))=4.3Å`
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