NCERT Exercise 3.11 - Classification of Elements and Periodicity in Properties

Question: Define isoelectronic species and give one species isoelectronic with F-, Ar, Mg2+ and Rb+.

Answer: Same electron count: F- with Ne; Ar with Cl-; Mg2+ with Ne; Rb+ with Kr.

Full step-by-step NCERT solution with diagrams on Something by Zero.