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5 December, 19:43

The isotopic mass of 210 Rn 86 is 209.989669 amu. When this nuclide decays by electron capture, it emits 2.368 MeV. What is the isotopic mass of the resulting nuclide?

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  1. 5 December, 19:50
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    Starting from the radon mass, add the mass of the electron, and subtract the mass attributable to the gamma radiation (931 Mev = 1 amu).
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