Plutonium-239 Decays into Uranium-235 Plus an Alpha Particle

question 34

Multiple Choice

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: , 4.002603 u; , 235.043924 u; what is the mass value of ?
1 u = 931.494 MeV/c².

• A) 239.052157 u
• B) 239.027750 u
• C) 239.001889 u
• D) 238.9991889 u
• E) 238.988842 u

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