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An element crystallises in a structure h...

An element crystallises in a structure having a f.c.c unit cell of an edge 200 pm. Calculate the density of element, if 20 gm the element contains `2.4 xx 10^(23)` atoms.

A

`"10.7 gm cm"^(-3)`

B

`"2.28 gm cm"^(-3)`

C

`"41.6 gm cm"^(-3)`

D

`"7.0 gm cm"^(-3)`

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The correct Answer is:
C
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