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Silicon has crystalline structure like d...

Silicon has crystalline structure like diamond. If the shortest distance between two silicon atoms is `100sqrt(3)` pm , the density of silicon is:
[Si = 30, N_(A) = 6 xx 10^(23)]`

A

`6.25 gm//cm^(3)`

B

`3.125 gm//cm^(3)`

C

`12.5 gm//cm^(3)`

D

`2.5 gm//cm^(3)`

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