neutron

Definition

A subatomic particle found in the nucleus of an atom, with no electric charge and mass slightly greater than a proton. It plays a key role in nuclear reactions.

日本語 原子核の中の、電気荷を持たない、質量がプロトンよりわずかに大きい、原子核粒子

Example

"The release of neutrons during fission is what sustains a nuclear chain reaction."