Answer
See explanation below.
Work Step by Step
The rule concerning the order in which electrons are removed from a transition metal atom to form an ion is that electrons with highest n value are removed first, then (n-1)d electron is removed.For example in V , elctronic configuration [Ar]4s2 3d2, first 4s electron is removed then 3d electron is removed.To study electronic configuration of atoms, magnetic properties and ionization energies are studied
