Always remember that the difference in ionization enthalpy of two successive states is approx or equal to 10 to 15 eV or less. The lower oxidation state is not stable; conversely if the difference is more than 15 eV, the lower oxidation state is more stable. Here the 3rd and 2nd ionization enthalpy difference is more than 15 eV; that's why second ionization enthalpy is more stable

Always remember that the difference in ionization enthalpy of two successive states is approx or equal to $10$ to $\pu{15 eV}$ or less. The lower oxidation state is not stable; conversely if the difference is more than $\pu{15 eV}$, the lower oxidation state is more stable. Here the $3^\mathrm{rd}$ and $2\mathrm{nd}$ ionization enthalpy difference is more than $\pu{15 eV}$; that's why second ionization enthalpy is more stable

Always remember that is the difference in ionization enthalpy of two successive States is approx or equal to 10 to 15 ev or less the lower Oxidation state is not stable conversely if the difference is more than 15 ev the lower Oxidation state is more stable. Here the 3rd and 2nd ionization enthalpy difference is more than 15 EV that's why second ionization enthalpy is more stable

Always remember that the difference in ionization enthalpy of two successive states is approx or equal to 10 to 15 eV or less. The lower oxidation state is not stable; conversely if the difference is more than 15 eV, the lower oxidation state is more stable. Here the 3rd and 2nd ionization enthalpy difference is more than 15 eV; that's why second ionization enthalpy is more stable