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Question

(B) The first ionisation potential $(I.P.)$ generally decreases as we move down a group due to the increase in atomic size and shielding effect. In Gr

Vedclass · Accepted Answer

$Be > Mg > Ca$

Vedclass · Answer

(B) The first ionisation potential $(I.P.)$ generally decreases as we move down a group due to the increase in atomic size and shielding effect. In Group $2$ $(Be, Mg, Ca)$,the order of $I.P.$ is $Be > Mg > Ca$. In Group $1$ $(Li, Na, K)$,the order is $Li > Na > K$. In Group $14$ $(C, Si, Ge)$,the order is $C > Si > Ge$. In Group $13$ $(B, Al, Ga)$,the order is $B > Al > Ga$. Therefore,the correct set is $Be > Mg > Ca$.

The set representing the correct order of first ionisation potential is

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