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Na and Mg crystallize in bcc- and fcc-ty...

`Na` and `Mg` crystallize in bcc- and fcc-type crystals, respectively, then the number of atoms of `Na` and `Mg` present in the unit cell of their respective crystal is

A

4 and 2

B

9 and 14

C

14 and 9

D

2 and 4

Text Solution

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Number of unit cell in bcc is 2 and in fcc is 4.
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