# An electron, a proton and a neutron have the same de Broglie wavelength. Which statements is true?

An electron, a proton and a neutron have the same de Broglie wavelength. Which statements is true?
All particles have the same speed but different momentum.
The proton and neutron have the same speed and the same momentum.
The electron has the highest speed and the highest momentum of these three particles.
The neutron has the lowest speed.
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Step 1
Given:
To explain the correct statement among the given statement as,
Step 2
Explanation:
A de-Broglie wavelength is given as,
$\lambda =\frac{h}{mv}$
Here, the mass of the electron is less hence the velocity will be more.
Therefore, the correct option is c. The electron is having the highest speed and the momentum of these particles.