Question

What is the de Broglie wavelength of an electron in the ground state of a hydrogen atom?

Answer 1

You are given the mass of an electron is 9.11x10^-31 kg and Planck's constant is 6.63x10^-34. We know the value of Planck's constant h and so to calculate the wavelength all we need is the momentum, which is equal to mv.

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