engineering chemistry MCQ #967

The wavelength associated with an electron is given by λ = h / √(2mE). If E = 100 eV, λ will be

engineering chemistry MCQ #967

  1. Question 1

    Q1. The wavelength associated with an electron is given by λ = h / √(2mE). If E = 100 eV, λ will be

    • A) 1.23 Å
    • B) 0.123 Å
    • C) 12.3 Å
    • D) 123 Å

    Answer: 1.23 Å

    Explanation: Using λ = h / √(2mE) and converting E to Joules, we get λ = 1.23 / √E = 1.23 Å for E = 100 eV.