Answered: A thorium-228 atom (mass 228.02 u)… | bartleby

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A thorium-228 atom (mass = 228.0287 u) decays to radium-224 (mass = 224.0202 u) through
alpha emission (mass
4.0026 u). The equation is shown below. How much energy is released from
this reaction?
228Th -
90
224 Ra +He+energy
(a) 1.2 MeV
(b) 2.4 MeV
(c) 4.1 MeV
(d) 5.5 MeV

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