What is the order of first,second,and third ionisation enthalpy? Why?
(N/A) The order of ionisation enthalpy is $3^{rd} > 2^{nd} > 1^{st}$.
This is because,as an electron is removed,the remaining electrons experience a greater effective nuclear charge due to the decrease in electron-electron repulsion and the constant nuclear charge.
Consequently,the attraction between the nucleus and the remaining electrons increases,requiring more energy to remove subsequent electrons.
This is because,as an electron is removed,the remaining electrons experience a greater effective nuclear charge due to the decrease in electron-electron repulsion and the constant nuclear charge.
Consequently,the attraction between the nucleus and the remaining electrons increases,requiring more energy to remove subsequent electrons.
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