Question

n atom contains one proton, one electron, and one neutron. which two particles are most similar in mass? the neutron and the electron the proton and the electron the proton and the neutron the neutron and the atom

Explanation:

In an atom, the mass of a proton and a neutron is approximately the same. The mass of an electron is much smaller compared to protons and neutrons. An atom's mass is mainly determined by protons and neutrons in the nucleus.

Answer:

C. the proton and the neutron