1. Is it possible to caculate the electric potential energy and the gravitational potential energy between two nucleon of deuterium (1 proton, 1 neutron), if we know the binding energy of deuterium is 2.23 (MeV), and the distance between them is 1 (fm)? Please help me! I'm really confused about this exercise :( Thanks in advance 2. Relevant equations: 3. The attempt at a solution Can i use the liquid drop model to solve this exercise?