What quantity is conserved in the following reaction?
A)baryon number
B)charge
C)lepton number
D)All of the above.

Question

What quantity is conserved in the following reaction? 
A)baryon number 
B)charge 
C)lepton number 
D)All of the above.

Quizplus · Accepted Answer

The conservation of baryon number ensures that the total number of baryons (such as protons and neutrons) before and after the reaction is the same. The conservation of charge ensures that the total charge (positive, negative or neutral) before and after the reaction is the same. The conservation of lepton number ensures that the total number of leptons (such as electrons and neutrinos) before and after the reaction is the same. All of these conservation laws are applicable in this reaction, hence the best choice is D.

What Quantity Is Conserved in the Following Reaction