The isotopes are all stable, while is radioactive. The mode of decay for is most likely to be
A) positron decay.
B) .$\alpha$ decay.
C) .$\gamma$ decay.
D) electron capture.
E) .$\beta$ decay.

Question

The isotopes  are all stable, while  is radioactive. The mode of decay for  is most likely to be
A) positron decay. 
B) .$\alpha$ decay. 
C) .$\gamma$ decay. 
D) electron capture. 
E) .$\beta$ decay.

Quizplus · Accepted Answer

The fact that the isotope is unstable and undergoing radioactive decay suggests that it is not a stable isotope. The most probable mode of radioactive decay for unstable isotopes is beta decay or electron emission. Therefore, the best choice is E (.F1F1F1S1F1F1F10 decay), which is beta decay.

The Isotopes Are All Stable, While Is Radioactive α\alphaα

The Isotopes Are All Stable, While Is Radioactive $\alpha$