Nuclear Binding Energy: When a stationary plutonium-239, 
Pu, decays into uranium-235 plus an alpha particle, the energy released in the process is 5.24 MeV. The following masses are known:
What is the mass of the 
Pu nucleus, in amu? (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
Answer: A
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Fill in the blank(s) with correct word