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Number of unit cells in 4 g of X (atomic...

Number of unit cells in 4 g of X (atomic mass = 40) which crystallises in bcc pattern is ( `N_A` = Avogadro number)

A

`0.1 N_A`

B

`2 xx 0.1 N_A`

C

`(0.1 N_A)/2`

D

`2 xx N_A`

Text Solution

Verified by Experts

The correct Answer is:
C
`40 g = N_A " atoms, " 4 g = 0.1xx N_A` atoms
2 atoms form 1 unit cell in bec crystal
`:. 0.1xx N_A " atoms " (0.1 xx N_A)/2` unit cells
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