When a beta particle is emitted,the mass number of the isotope remains unchanged.

Question

Quizplus · Accepted Answer

When a beta particle is emitted, a neutron in the nucleus is converted into a proton and an electron, which is emitted as a beta particle. The mass number, which is the sum of the number of protons and neutrons in the nucleus, remains the same because although a neutron has been converted into a proton, the total number of nucleons (protons and neutrons) in the nucleus remains the same.

When a Beta Particle Is Emitted,the Mass Number of the Isotope