Consider the helium atom which consists of two electrons orbiting a nucleus made up of two protons and two neutrons. If both electrons are at a distance of r = 3.1 × 10-11 m away from the nucleus, as in figure, what is the potential energy (in eV) of the helium atom? Treat the nucleus as pointlike. - Give answer to 4 significant figures. Okay so here is my problem... but I cant seem to get the right answer... I keep gettin a number that 10E7 higher than the answer that its meant to be... I dont really know why? I am using the formula P.E=kqq'/r but it just aint workin.... anyone know any good formulas that may help... I got an explanation from someone but it didnt help at all! Could anyone explain it easier?