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Plutonium-239 is a fissile isotope, which can fission into caesium and yttrium, Cs-138 + Y-
99. The masses of these three isotopes are respectively 239.0522, 137.9110 and 98.9246 amu,
and the mass of the neutron is 1.0087 amu.
i) Write the equation for this reaction, in the style of the reaction of Question A7.
Calculate the energy (in MeV) given off in the reaction.
ii)

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