Answer
$^{19}_{40}K → ^{40}_{18}Ar + ^{0}_{+1}e$
Work Step by Step
Potassium decays into Argon and a positron
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.