Which of the following has the least ionizati | vedclass

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(A) The ionization potential $(I.P.)$ is the energy required to remove the most loosely bound electron from an isolated gaseous atom.Among the given e

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Lithium $(Li)$

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(A) The ionization potential $(I.P.)$ is the energy required to remove the most loosely bound electron from an isolated gaseous atom.Among the given elements,Lithium $(Li)$ is an alkali metal with a large atomic size and low effective nuclear charge,making it easiest to remove its valence electron.The $I.P.$ values are approximately: $Li \approx 5.4 \ eV$,$He \approx 24.6 \ eV$,$N \approx 14.5 \ eV$,and $Zn \approx 9.4 \ eV$.Therefore,$Li$ has the least ionization potential.

Element	Ionization energy $1^{st}$ $(kJ/mol)$	Ionization energy $2^{nd}$ $(kJ/mol)$
$X$	$495$	$4563$
$Y$	$731$	$1450$

Which of the following has the least ionization potential?

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$Y$ $731$ $1450$

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