1. The problem statement, all variables and given/known data The nucleus of a Helium atom contains 2 protons which are 1.0fm apart. How much work has to be done by an external agent to bring the two protons from an infinite separation to a distance of 1.0fm. 2. Relevant equations F=k|q1||q2|/r^2 W=F*r 3. The attempt at a solution Would i just need to use the charge of a proton to find the force? and then plug it into the work equation?