How would you explain the fact that the second ionisation potential is always higher than the first ionisation potential? - Chemistry

How would you explain the fact that the second ionisation potential is always higher than the first ionisation potential?

Answer in Brief

Second ionization potential is always higher than the first ionization potential.
Removal of one electron from the valence orbit of a neutral gaseous atom is easy so first ionization energy is less. But from a uni positive ion, removal of one more electron becomes difficult due to the more forces of attraction between the excess of protons and less number of electrons.
Due to greater nuclear attraction, second ionization energy is higher than first ionization energy.

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Periodic Trends in Properties

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Chapter 3: Periodic Classification Of Elements - Evaluation [Page 96]

Chapter 3 Periodic Classification Of Elements
Evaluation | Q II. 7. | Page 96

Various successive ionisation enthalpies (in kJ mol^-1) of an element are given below.

IE₁	IE₂	IE₃	IE₄	IE₅
577.5	1,810	2,750	11,580	14,820

The element is

In the third period the first ionization potential is of the order.

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Explain the following, give an appropriate reason.

The electron affinity values of Be and Mg are almost zero and those of N (0.02 eV) and P (0.80 eV) are very low.

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