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Na and Mg crystallise in b.c.c. and f.c....

`Na` and `Mg` crystallise in `b.c.c.` and `f.c.c.` type crystals respectively, then the number of atoms of `Na` and `Mg` present in the unit cell of their repsectively crystal is `:`

A

`4 and 2`

B

`9 and 14`

C

`14 and 9`

D

`2 and 4`

Text Solution

Verified by Experts

The correct Answer is:
D
No. of unit cell in `b.c.c.` is 2 and `f.c.c.` is 4
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