Question

Screening effect is not observed in :-

• A. $H{e}^{+}$
• B. $L{i}^{2+}$
• C. $B{e}^{3+}$
• D. In all cases

Answer 1

The correct option is D In all cases

The screening effect takes place for the elements which have at least two electrons. Here all have only 1 electron thus does not have any other electron to screen the electrons from the nucleus.