Fission/Fusion reactions confusion help plz 1. The problem statement, all variables and given/known data http://www.xtremepapers.com/papers/...and AS Level/Physics (9702)/9702_s03_qp_4.pdf number 6 http://www.xtremepapers.com/papers/...nd AS Level/Physics (9702)/9702_s04_qp_4.pdf 8 2. Relevant equations E=mc^2 3. The attempt at a solution Can someone clarify 6a for me please? The answer says "greater binding energy gives rise to release of energy", which seems quite vague Also for the second question, it says "energy released in this fission reaction", but if you were to write down the equation, the energy you get at the right hand side is a negative, which means energy is needed for the reaction to occur? 235(1.2191)=144(a.3341)+90(1.3864)+E in the end i get, 0=30.4+E ?