Screeningeffect is notobserved in

1.	Screeningeffect is notobserved in
Answer» `He^(+)` `Li^(2+)` `Be^(3+)` in allthe three Solution :Allthe threeions i.e.,`He^(+) (1S^(1)),Li^(2+)(1s^(1) ) . Be^(3+)` `(1s^(1))` haveno ELECTRONS INTHE innershellsand hencescreeningeffectis notobserved.

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