## Physics: Principles with Applications (7th Edition)

Published by Pearson

# Chapter 27 - Early Quantum Theory and Models of the Atom - Questions: 17

#### Answer

The proton has the shorter wavelength.

#### Work Step by Step

The proton has a larger mass than the electron, and if they travel at the same speed it will have the larger momentum. The wavelength is inversely proportional to the particle’s momentum, $\lambda = \frac{h}{p}$.

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