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In NaCl unit cell, all the ions lying al...

In NaCl unit cell, all the ions lying along the axis as shown in the figure are removed. Then the number of `Na^(+)` and `Cl^(-)` ions remaining in the unit cell are-

A

4 and 4

B

3 and 3

C

1 and 1

D

4 and 3

Text Solution

Verified by Experts

The correct Answer is:
B
On removing all the ions lying along the axis one `Na^(+)` from centre and `2Cl^(-)` from face centres are removed.
`therefore` No. of `Na = 12 xx 1/4 = 3`
`Cl = 8 xx 1/8 + 4 xx 1/2 = 3`
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