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A solid element (monoatomic) exists as c...

A solid element (monoatomic) exists as cubic crystal. If its atomic radius is `1.0Å` and the ratio of packing fraction and density is `0.1 cm^(3)gm`, then the atomic mass of the element is : `(N_(A) = 6 xx 10^(23)`

A

`8pi`

B

`16pi`

C

`80pi`

D

`4pi`

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