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

question 7

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 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

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