The coordination number of a central atom in a molecules or crystal is the number of its nearest neighbours. The coordination number of sodium in \[{{\operatorname{Na}}_{2}}O\] is
A) 2
B) 4
C) 6
D) 8
Correct Answer:
B
Solution :
In \[N{{a}_{2}}O\], \[N{{a}^{+}}\] is surrounded by 4 ion. Four oxide ion it has anti fluorite structure.