Answer:
A proton is one of three main particles that make up the atom. Protons are found in the nucleus of the atom. This is a tiny, dense region at the center of the atom. Protons have a positive electrical charge of one (+1) and a mass of 1 atomic mass unit (amu)
neutrons have no charge—they are electrically neutral. That's why the neutrons in the diagram above are labeled n0 . The zero stands for "zero charge". The mass of a neutron is slightly greater than the mass of a proton, which is 1 atomic mass unit (amu) . (An atomic mass unit equals about 1.67×10−27 kilograms.)
