1. The problem statement, all variables and given/known data How does the electric force between two hydrogen nuclei placed a certain distance apart compare with the force between two helium nuclei placed twice as far apart? 2. Relevant equations F= k * q1 x q2 / d^2 3. The attempt at a solution The force would actually be the same between the hydrogen nuclei and the helium nuclei because although the charge on the helium nuclei is double that of hydrogen (2), the distance between them is also doubled; cancelling out any effect the increased charge could have on the force because force is proportional to the charge of the particles by the distance between them squared. Thanks in advance!