Answer to Question #259793 in Physics for Arvin Shopon

Question #259793

Write the reaction equation for electron capture on a potassium-40 nucleus and calculate the reaction energy.

Expert's answer

The equation is

"^{40}_{19}\\text{K}+e^-\u2192^{40}_{18}\\text{Ar}."

The energy* is

"E=\\Delta mc^2=1.873\\text{ MeV}."

*Ar-40 is 39.962 amu,

K-40 is 39.964008 amu.

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