The second ionisation enthalpy of an alkaline earth metal is higher than its first ionisation enthaply. Why is it so ?

The ionisation enthalpy of alkaline earth metals is

The second ionisation enthalpies of elements are always higher than their first ionisation enthalpies because:

Why is the second ionisation energy of an element much greater than its first ionisation energy ?

Why are the second ionisation enthalpies of group 1 elements much higher than their first ionisation enthalpies ?

Write the trend of hydration enthalpies of alkaline earth metal ions.

Write the trend of hydration enthalpies of alkaline earth metal ions.

The first ionisation enthalpies of the alkline earth metals are higher than that of alkali metals but second ionisation ethalpies are smaller, why?

(a). Which alkaline earth metals do not give characteristic colour to the Bunsen flame? (b). Why alkaline earth metals do not form tripositive ions? (c ). Why alkaline earth metals are diamagnetic, but alkali metals are paramagnetic? (d). Why the first inonisation enthaply pf alkaline earth matals is higher than those of corresponding alkali metals? (e). Why alkaline earth metals are less electropositive than corresponding alkali metals?

The first ionization energies of alkaline earth metal are higher than those of the alkali metals. This is because:

Why are the second ionisation energies of alkaline earth metals much smaller than those of alkali metals ?