Plutonium-239 decays into uranium-235 plus an alpha particle.The energy released in the process is 5.24 MeV.Given the following mass values 
He: 4.002603 u 
U: 235.043924 u what is the mass of 
Pu in atomic mass units? (1 u = 931.494 MeV/c2)
A) 239.05215 u
B) 239.02775 u
C) 239.00189 u
D) 238.99919 u
E) 238.98884 u
Correct Answer:
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