Screening effect is not observed in:

H e^{+}

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L i^{2 +}

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B e^{3 +}

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all of the above

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Solution

The correct option is C all of the above
$H e^{+}, L i^{2 +}$ and $B e^{3 +}$ each has one electron, hence all the nuclear charged is absorbed by one electron and thus no screening effect is observed.

Hence, the correct option is $D$

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Similar questions

Correct order of radius of the $1^{s t}$ orbit of $H$ , $H e^{+}, L i^{2 +}, B e^{3 +}$ is:

H, H e^{+}, L i^{2 +}, B e^{3 +}

H < H e^{+} < L i^{2 +} < B e^{3 +}

L i^{2 +}, H e^{+}, B e^{3 +} .

H e^{+}, L i^{2 +}

B e^{3 +}

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