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Aluminium crystallizes in a cubic close ...

Aluminium crystallizes in a cubic close packed structure . Its metallic radius is 125 pm .
How many unit cells are there in 1.00 `cm^(3)` of aluminium.

Text Solution

Verified by Experts

Volume of the unit cell = `a^(3) = (353.5 xx 10^(-10) cm )^(3)`
= `442 xx 10^(-25) cm^(3)`
Number of unit cell = `(1)/(4.42 xx 10^(-25))`
`= 2.26 xx 10^(22)` unit cells .
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