I have two questions :
In a simple hydrogen atom $(^1_1H)$, there is no neutron. So, if there is no nuclear force to hold the nucleus together then what is the thing that is holding the atom together? Why doesn't the proton get out of the atom ?
If there is no neutron, does this mean that the binding energy of Hydrogen atom is $0$ ? I came across a question, in which binding energy of helium atom was to be calculated and in the solution the atomic mass of helium atom was subtracted from the sum of 2 Hydrogen atoms $(2\space\times 1.0078u)$ and 2 neutrons $(2\space\times1.0087u$), so wouldn't this imply that the binding energy of hydrogen is $0$?