Question

factors affecting ionisation enthalpy​

Answer 1

Answer:

Size of the positive nuclear charge. As the nuclear charge increases, its attraction for the outermost electron increases and more energy is required to remove an electron. ...

Size of atom (distance of outermost electron from the nucleus) ...

Screening (shielding) effect of inner shell electrons.

Answer 2

Atomic size :-

Ionization enthalpy is generally inverse proportional to the atomic size it means the smaller the atomic size lesser will be the distance between the nucleus and the valence electrons. As a result, greater will be the attraction of nucleus for the valence electrons. Hence it will be more difficult to remove an electron from the valence shell therefore higher will be the ionization enthalpy.

Nuclear Charge :-

The ionization enthalpy is directly proportional to nuclear energy it means higher the nuclear charge greater will be the attraction of nucleus for the valence electron hence it will be more difficult to remove an electron from the valence shell of an atom. Therefore, higher will be the ionization enthalpy.