An electron and a proton are accelerated through a potential . If and are their momentum, then ratio — Atomic Structure Chemistry Question

💡 Solution & Explanation

Both acquire the same kinetic energy $K = eV$. Momentum $P = \sqrt{2mK} = \sqrt{2meV}$. The ratio $P_p / P_e = \sqrt{m_p / m_e} = \sqrt{1836} \approx 42.85 \approx 43$. Therefore, correct answer is D.