Question

In a hydrogen atom, if the energy of an electron in the ground state is 13.6 eV, then that in the second excited state is 

(a) 1.51 eV

(b) 3.4 eV

(c) 6.04 eV

(d) 13.6 eV

Answer 1

Correct option is (a) 1.51 eV

Second excited state means, n = 3 

\(\therefore \) E₃ = -13.6/3² = 1.51 eV