Final answer:
A neutron is a neutrally charged particle with a slightly larger mass than a proton.
Step-by-step explanation:
A neutron is not a combination of a proton and an electron either by mass or charge. A neutron is a neutrally charged particle, meaning it has no charge. It has a slightly larger mass than a proton. The neutron's mass is approximately 1.0087 atomic mass units (amu), while the proton's mass is about 1.0073 amu. The electron, on the other hand, is much lighter than both the neutron and the proton, with a mass of about 0.00055 amu. The neutron is one of the two basic building blocks of atomic nuclei, with the other being the proton.