Question

Of the following pairs of species which one will have the same electronic configuration for both members?

(a) Li^+ and Na^+

(b) He and Ne^+

(c) H and Li

(d) C and N^+

This question was addressed to me by my school principal while I was bunking the class.

Enquiry is from Alpha-Particle Scattering and Rutherford’s Nuclear Model of Atom topic in section Atoms of Physics – Class 12

Answer 1

Right option is (d) C and N^+

To explain I would say: Carbon and the positive ion of nitrogen (N^+) will have the same electronic configuration.

The electronic configuration of both Carbon and the positive ion of nitrogen is as follows:

 1s^22s^22p^6.