Answer: True
A neutron is one of the three main subatomic particles that make up an atom. It indeed has an approximate mass of 1 atomic mass unit (amu), which is nearly equivalent to that of a proton. Unlike protons, which carry a positive charge, neutrons have no charge at all, making their charge 0. Additionally, neutrons are found within the nucleus of an atom along with protons. This combination of neutrons and protons determines the atomic mass and stability of the nucleus. Therefore, all parts of the statement are accurate.