1.

Lithium metal crystallized in a body centred cubic crystal. If the length of the side of the unit cell of lithium is 351 pm, the atomic radius of the lithium will be :

Answer»

152pm
75 PM
300 pm
240 pm

Solution :For bcc structure
` = sqrt( 3) a = 4r` or `r = ( sqrt( 3))/( 4)a `
` :. r = ( sqrt( 3))/( 4) XX 351` = 151.98 `pm


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