Use the de Broglie wavelength equation where:
Plugging in the values of electron and proton:
Compare the wavelengths of an electron (mass = 9.11 x 10 −31 kg) and a proton (mass = 1.67 x 10−27 kg), each having a speed of 3.4 x 10 6 m/s.
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Our data indicates that this problem or a close variation was asked in Chemistry: The Molecular Nature of Matter and Change - Silberberg 8th Edition. You can also practice Chemistry: The Molecular Nature of Matter and Change - Silberberg 8th Edition practice problems.