Chemistry-Quantum Mechanical Model
NEET Chemistry Quantum Mechanical Model MCQ Question
Type: MCQ-numerical-Medium-Class 11
If the de Broglie wavelength of an electron is 800 pm, what is its velocity?
A
9.1 × 10^3 m/s
B
89 × 10^6 m/s
C
5.5 × 10^5 m/s
D
5 × 10^7 m/s
Correct Answer
Option B
Detailed Explanation
Using the de Broglie equation λ = h/mv, where h is Planck's constant (6.63 × 10^-34 Js), m is the mass of the electron (9.1 × 10^-31 kg), and λ is the wavelength (800 × 10^-12 m), solving for v gives the velocity.
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