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(A) The ionisation potential refers to the energy required to remove an electron from a gaseous atom or ion. Comparing the species: $Li^{+}$ $(1s^2)$

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$Li^{+}$

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(A) The ionisation potential refers to the energy required to remove an electron from a gaseous atom or ion. Comparing the species: $Li^{+}$ $(1s^2)$ has a stable noble gas configuration (isoelectronic with $He$). $Mg^{+}$ $([Ne] 3s^1)$ has one electron in the $3s$ orbital. $Al^{+}$ $([Ne] 3s^2)$ has two electrons in the $3s$ orbital. $Ne$ $(1s^2 2s^2 2p^6)$ is a neutral noble gas. Among these,$Li^{+}$ has the highest effective nuclear charge relative to its size and a very stable $1s^2$ configuration,making it the most difficult to remove an electron from. Therefore,$Li^{+}$ has the highest ionisation potential.

Which of the following species has the highest ionisation potential?

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Assertion : Element has a tendency to lose the electron$(s)$ to attain the stable configuration.
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