Why the first ionisation energy of carbon atom is greater than that of boron atom whereas, the reverse is true for the second ionisation energy.

The first ionisation energy of first atom is greater than that of second atom, whereas reverse order is true for their second ionisation energy. Which set of elements is in accordance to above statement?

The first ionisation energy of first atom is greater than that of second atom, whereas reverse order is true for their second ionisation energy. Which set of elements is in accordance to above statement?

The firstionisation energy of first atom is greater than that of second atom whereas reverse order is true for their second ionisation energy which set of elements is in accordance to above statement?

The first ionisation energy of magnesium is greater than that of sodium, whereas the reverse is true for second ionisation energy. Explain.

Give justification, The first lonisation enthalpy of carbon is greater than that of boron, whereas the reverse is correct for the second ionisation enthalpy.