An electron (), a proton (), and an alpha particle () possess identical kinetic energies. What is th — Atomic Structure Chemistry Question

💡 Solution & Explanation

For identical Kinetic Energies, $\lambda \propto 1/\sqrt{m}$. Since the mass order is $m_e < m_p < m_\alpha$, the inverse square root yields the wavelength order $\lambda_e > \lambda_p > \lambda_\alpha$.