NCERT In-Text Page 53 Q2 - Structure of the Atom

Question: Write the electronic configuration of any one pair of isotopes and isobars.

Answer: Isotopes Cl-35 & Cl-37: both 2,8,7. Isobars Ca-40: 2,8,8,2 and Ar-40: 2,8,8.

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