Question

In a nuclear reaction, which is the same before and after the change?(1 point)
Responses

the types of atoms
the types of atoms

the total number of protons
the total number of protons

the mass
the mass

the number of alpha particles

Answer 1

In a nuclear reaction, the total number of protons remains the same before and after the change. Therefore, the correct response is:

**the total number of protons**