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Aluminium crystallises in a cubic close-...

Aluminium crystallises in a cubic close-packed structure. Radius of the atom in the metal is 125 pm.
How many unit cells are there in 1 cm of aluminium?

A

354 pm, 2.254 x `10^22` unit cells

B

254 pm, 3.254 x `10^22` unit cells

C

454 pm, 4.254 x `10^22 ` unit cells

D

654 pm, 5.254 x `10^22` unit cells

Text Solution

Verified by Experts

The correct Answer is:
B
` = (10^(-6) m^3)/(44.36 xx 10^(-30) m^3) = 2.254 xx 10^22` unit cells.
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