Revision NoteIonisation Energies: EquationsThe second ionisation energy (IE2) is the energy required to remove the second mole of electrons from each +1 ion in a mole of gaseous +1 ions, to form one mole of +2 ions The third ionisation energy (IE3) is the energy required to remove the third mole of...
The first electron removed has a low IE1 as it is easily removed from the atom due to the spin-pair repulsion of the electrons in the 4s orbital The second electron is more difficult to remove than the first electron as there is no spin-pair repulsion The third electron is much more difficult to ...
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