engineering physics MCQ #387

The energy required to excite an electron from n = 1 to n = 3 in hydrogen atom is

engineering physics MCQ #387

  1. Question 1

    Q1. The energy required to excite an electron from n = 1 to n = 3 in hydrogen atom is

    • A) 12.09 eV
    • B) 10.2 eV
    • C) 13.6 eV
    • D) 1.89 eV

    Answer: 12.09 eV

    Explanation: Using En = -13.6 / n² eV, ΔE = E3 - E1 = -1.51 - (-13.6) = 12.09 eV.