Question

how does the nucleus change in beta - plus decay? (1 point) the mass number decreases by one, and the atomic number remains the same. the mass number remains the same, and the atomic number increases by one. the mass number increases by one, and the atomic number remains the same. the mass number remains the same, and the atomic number decreases by one.

Explanation:

In beta - plus decay, a proton in the nucleus is converted into a neutron, a positron, and a neutrino. The mass number (sum of protons and neutrons) remains the same because the number of nucleons does not change. The atomic number (number of protons) decreases by one since a proton is changed into a neutron.

Answer:

The mass number remains the same, and the atomic number decreases by one.