1.

In a face centred cubic unit cell of close packed atoms, the radius of atom ( r ) is related to the edge length (a) of the unit cell by the expression

Answer»

`R = ( a)/( sqrt(2))`
`r = ( a)/( 2)`
`r = ( a)/( 2 sqrt(2))`
`r = ( sqrt(3)a)/(4)`

ANSWER :C


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