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If the distance between Na^+ and Cl^(-) ...

If the distance between `Na^+` and `Cl^(-)` ions in NaCl crystal is 'a' pm, the edge length of the unit cell is

A

2a pm

B

`a//2` pm

C

4a pm

D

`a//4` pm

Text Solution

Verified by Experts

The correct Answer is:
A
`2(Na^(+) +Cl^(-))` = edge length
2a = edge length
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