Question

Question 2.22 Which of the following are isoelectronic species i.e., those having the same number of electrons?

Na+, K+, Mg2+, Ca2+, S2–, Ar

Class XI Structure of Atom Page 66​

Answer 1

sodium and magnesium or potassium and calcium or sulphur and argon pair se isoelectronic apecies hogo