1.

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

Answer»

`1.86Å`
`3.22Å`
`5.72Å`
`0.93Å`

Solution :For body CENTRED cubic LATTICE,
Radius, `R = ( SQRT( 3))/( 4) a `
`a = 4.29 Å`
`:. r = ( 1.732)/( 4) xx 4.29 = 1.86 Å`


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