Ground state energy units for hydrogen atom · CAP 2019 #1

Physics · modern-physics

Problem

Which of the following expressions has the correct units to represent the ground state energy of the electron in a Hydrogen atom? (

\hbar = h/2\pi

below) a)

\frac{me^4}{\hbar^2\epsilon_0^2}

\frac{me^4\hbar}{\epsilon_0^2}

\frac{me^4}{\hbar\epsilon_0^2}

\frac{\hbar^2\epsilon_0^2}{me^4}