Question

Which has more energy proton or electron?

Answer 1

1. If we consider that a electron and a proton are at rest kept in isolation, then the energy associated with their (rest) mass is given by Einstein's mass-energy equivalence formula.
2. The equivalent energy of a particle at rest is given as $E=m{c}^2$, where, $E$ is the energy, $m$ is the rest mass of the particle and $c=3\times {10}^8\mathrm{m}/\mathrm{s}$ is the speed of light in vacuum.
3. The mass of a proton is about $1836$ times the mass of an electron.

Hence, the energy of the proton will be greater.