Which of the following particles has no charge?

The neutron is the particle that has no charge. It is one of the primary constituents of atomic nuclei, along with protons. Neutrons contribute to the mass of the atom but do not affect its electric charge. This uncharged nature is significant because it allows neutrons to play a crucial role in stabilizing the nucleus without influencing the overall charge balance that protons do.

In contrast, protons carry a positive charge, electrons carry a negative charge, and while photons are also neutral, they are fundamentally different as they are particles of light and do not exist in the nucleus like neutrons and protons. Therefore, in the context of atomic structure and charge, the neutron stands out as the particle without a charge.