a) Q=(M2H+M3H–MHe+mn)c2
(M2H)c2=(MH+mn)c2–2116MeV
(M3H)c2=(MH+2mn)c2–3283MeV
(MHe)c2=(2MH+2mn)c2–4707MeV
vilket ger Q=−2116−3283−(−7707)=1747 MeV
b) U=e240(R2H+R3H)=(R=R0A13R0=14fm)=380keV