Q. What is the coordination number of sodium in $Na_{2}O$?
A) 2
B) 4
C) 6
D) 8
Explanation
(b)
In $Na_{2}O,$ each oxide ions $(O^{2 -})$ is co-ordinated to $8Na^{+}$ ions and each $Na^{+}$ ion to 4 oxide ions. Hence, it has 4 : 8 coordination
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.