Ionisation Enthalpy

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

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

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

In the periodic table, the highest ionisation enthalpies are for:

What is the order of successive ionisation enthalpies?

What is the order of successive ionisation enthalpies?

Compare the first and second ionisation enthalpies of sodium and magnesium .