EAN of Cr in [Cr(NH3)6]Cl3 is
32
33
34
35
Cr is in +3 oxidation state EAN = Atomic number – oxidation state + 2 × Number of ligands = 24 – 3 + 2 × 6 = 33
The effective atomic number (EAN) of 24Cr in [Cr(NH3)6]Cl3 is :