Brand new member--am I at the right place?? Greetings one and all. I was reading some history of the Manhattan Project the other day, and my mind started to wander/wonder. I wish to better understand the concepts of fussion, in particular, and other aspects of nuclear physics. I already have done a little research, and have many questions!! For example, I do not understand why fussion GIVES OFF energy when binding the two hydrogen atoms into one helium atom--it seems the process would require energy to be GIVEN TO the process. Actually, I can see where no energy need be added--mass is converted to the binding energy that holds the helium atom together (mass defect). But, I still do not see where the extra energy produced comes from, other than a small amount from the extra neutron being ejected from the new helium atom. Am I at the right place to seek answers to my questions?