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Sodium metal crystllizes in a body centr...

Sodium metal crystllizes in a body centred cubic lattice with a unit cell edge of `4.29 Å`. The radius of sodium atom is approximately

A

`0.93 Ã…`

B

`1.86 Ã…`

C

`3.22 Ã…`

D

`5.72Ã…`

Text Solution

Verified by Experts

The correct Answer is:
B
For body centred cubic unit cell :
`asqrt(3)=4r`
`r=(4.29xx1.732)/(4)=1.857=1.86 Ã…`
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