Potassium-40 can decay in three modes .It can decay by `beta^(-)` -emission,`
Channel: Doubtnut
Date: 2020-07-05

Potassium-40 can decay in three modes .It can decay by `beta^(-)` -emission,`beta^(+) -emission or electron capature. (a) Write the equation showing the end products. (b) Find the Q-value in each of the three cases. Atomic masses of `_18^40(Ar)`,`_19^40K`and `_20^40(Ca)` are 39.9624 u,39.9640 u,and 39.9626 u respectively.