Question

What is defination EAN rule?

Answer 1

Hello friend
EAN rule, that in a number of metal
complexes the metal atom tends to surround itself with sufficient ligands that the resulting effective atomic number is numerically equal to the atomic number of the noble-gas element found in the same period in which the metal is situated.
Hope it helps

Answer 2

Hello mate here is your answer

A metal ion continues to accept electron pair from the ligands till the total number electrons present around the metal ion in the complex becomes equal to the atomic number of the next rare gas atom.This is called as EAN rule.