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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

`6.8Å`

B

`4.3Å`

C

`3.0Å`

D

`8.6Å`

Text Solution

Verified by Experts

The correct Answer is:
B
Neighbour distance of a body centred cubic cell
`d=(sqrt3)/(2)a`, where a is the lattice parameter.
`implies3.7=(sqrt3a)/(2)`
or `a=(2xx3.7)/(sqrt3)=4.3Å`
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