Radium-226 Decays into Radon-222 Plus an Alpha Particle $^{4}_{2}$ He: 4002603 U

question 109

Multiple Choice

Radium-226 decays into radon-222 plus an alpha particle. The relevant masses are $^{4}_{2}$ He: 4.002603 u $^{222}_{86}$ Rn: 222.017570 u $^{226}_{88}$ Ra: 226.025402 u How much energy is released in this process? (1 u = 931.5 MeV/c²)

• A) 4.24 MeV
• B) 3.76 MeV
• C) 4.87 MeV
• D) 5.05 MeV
• E) 5.39 MeV

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