It is true that the electrostatic repulsive force between two protons ( alone in free space ) greatly exceeds the gravitational attractive force between the same two protons .
It is true that the electrostatic repulsive force between two protons ( alone in free space ) greatly exceeds the gravitational attractive force between the same two protons , and that is because the charge on the protons is approximately the Planck unit of charge but the mass of the protons is far , far less than the Planck mass .