NCERT Exercise 3.15 - Classification of Elements and Periodicity in Properties

Question: Hydrogen ground-state electron energy is -2.18 x 10^-18 J. Find ionisation enthalpy in J mol^-1.

Answer: 1.31 x 10^6 J mol^-1 (about 1312 kJ mol^-1).

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