Sodium metal crystallizes in a body cent...

Sodium metal crystallizes in a body centered cubic lattice with the cell edge `a = 4.29 Å`. The radius of sodium atom is:

A

`2.145Å`

B

`1.86Å`

C

`1.315Å`

D

None of these

Verified by Experts

The correct Answer is:

B

Cube diagonal
`4r=sqrt3a`
`r=sqrt3/4a=sqrt3/4times4.29Å=1.8576Å`

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