The first,second and third Ionisation energie | vedclass

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(D) The stability of an oxidation state is determined by the jump in ionization energy. $A$ large jump in ionization energy indicates the removal of a

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$+2$

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(D) The stability of an oxidation state is determined by the jump in ionization energy. $A$ large jump in ionization energy indicates the removal of an electron from a stable,noble gas-like configuration. Given: $E_1 = 7 \ eV$,$E_2 = 12.5 \ eV$,$E_3 = 42.5 \ eV$. The jump from $E_2$ to $E_3$ is $42.5 - 12.5 = 30 \ eV$,which is significantly larger than the jump from $E_1$ to $E_2$ $(12.5 - 7 = 5.5 \ eV)$. This large jump after the second ionization energy indicates that it is very difficult to remove the third electron. Therefore,the element most easily loses two electrons to achieve a stable configuration,making $+2$ the most stable oxidation state.

The first,second and third Ionisation energies ($E_1, E_2$ and $E_3$) for an element are $7 \ eV, 12.5 \ eV$ and $42.5 \ eV$ respectively. The most stable oxidation state of the element will be

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