What nuclide is produced when K-40 decays by positron emission?

Name: What nuclide is produced when K-40 decays by positron emission?
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Question

Quizplus · Accepted Answer

K-40 undergoes beta-plus (or positron) decay to become Ar-40. The mass number of the nucleus remains the same at 40, but the atomic number decreases by 1, changing from 19 (potassium) to 18 (argon). Therefore, the correct nuclide produced after the decay of K-40 by positron emission is 11eab151_65af_0e8f_896a_370094b33c29_TB3370_11 Ar.

What Nuclide Is Produced When K-40 Decays by Positron Emission