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What is the co-ordination number of s...

What is the co-ordination number of sodium in `Na_(2)O` ?

A

6

B

4

C

8

D

2

Text Solution

Verified by Experts

The correct Answer is:
B
`Na_2O` has antiflourine structure. `O^(2-)` ions constituent a ccp lattice and `Na^+` ions occupy the tetrahedral viods, each `O^(2-)` ion is contact with `8Na^+` ions and each `Na^+` ion in contact with `4O^(2-)` ions. Thus C.N. of sodium in `Na_2O=4`
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