A neutron has what electrical charge?

A neutron is a subatomic particle found in the nucleus of an atom and is characterized by having no electrical charge. This is why the correct answer is that a neutron is neutral. The lack of charge means that neutrons do not participate in electromagnetic interactions, which is the reason they can exist within the nucleus alongside positively charged protons without repulsion.

In the context of atomic structure, neutrons play a crucial role in contributing to the mass of the atom while helping to stabilize the nucleus, allowing protons to stay bound together despite their positive charges that would otherwise cause repulsion. Understanding the properties of neutrons, including their neutral charge, is fundamental in the study of atomic physics and how atoms interact during various processes.