Which of the following elements would lose an | vedclass

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(B) The ease with which an element loses an electron is determined by its ionization energy.Lower ionization energy means the element loses an electro

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$K$

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(B) The ease with which an element loses an electron is determined by its ionization energy.Lower ionization energy means the element loses an electron more easily.Ionization energy generally decreases down a group and increases across a period from left to right.Comparing the given elements: $Na$ (Group $1$,Period $3$),$Mg$ (Group $2$,Period $3$),$K$ (Group $1$,Period $4$),and $Ca$ (Group $2$,Period $4$).Among these,$K$ is in the lowest period (Period $4$) and Group $1$,meaning it has the largest atomic size and the weakest nuclear hold on its valence electron.Therefore,$K$ has the lowest ionization energy and loses an electron most easily.

Which of the following elements would lose an electron easily?

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