engineering chemistry MCQ #966

The energy of an electron in the nth orbit is given by En = -13.6 / n² eV. The energy of an electron in n = 3 is

engineering chemistry MCQ #966

  1. Question 1

    Q1. The energy of an electron in the nth orbit is given by En = -13.6 / n² eV. The energy of an electron in n = 3 is

    • A) -1.51 eV
    • B) -3.4 eV
    • C) -4.53 eV
    • D) -13.6 eV

    Answer: -1.51 eV

    Explanation: Substitute n = 3 into En = -13.6 / n² to get E3 = -13.6 / 9 = -1.51 eV.