In physics, the potential energy is energy possessed by a body by virtue of its position relative to others, stresses within itself, electric charge, and other factors.
P.E. = -e2 / 4πε0r = m e4 / 4 ε02 n2 h2
ε0 = permittivity of free space
e = Charge on an electron (1.6 x 10–19 C)
r = radius of the orbit of an electron
m= mass of an electron
n = positive integer
h = Planck’s constant