Question

An electron in the n = 1 orbit of hydrogen atom is bound by 13.6 eV. If a hydrogen atom is in the n = 3 state, how much energy is required to ionize it.

• A. 13.6 eV
• B. 4.53 eV
• C. 3.4 eV
• D. 1.51 eV

Answer 1

Answer: (D)

1.51 eV

Answer 2

Required energy $E_{3} = \frac{+ 13.6}{3^{2}} = 1.51eV$