Which event does not occur during the decay of potassium-40 isotopes?

A) An electron orbiting near the nucleus enters into the nucleus and combines with a proton to produce a neutron.
B) Electrons rearrange, producing x-rays.
C) A neutron changes to a proton and emits an electron.
D) A proton is ejected from the nucleus.


Answer: D

Environmental & Atmospheric Sciences

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