Q. What is the EAN of nickel in $Ni(CO)_{4}$?
A) 38
B) 30
C) 36
D) 32
Explanation
(c)
Effective atomic number (EAN)
= Atomic no. –O.S. +2 $\times$ C.N.
= 28-0+2$\times$4
= 28+8
= 36
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.