Neutron
What is Neutron?
A neutron is a subatomic particle found in the nucleus of all atoms except the most common isotope of hydrogen. It has no electric charge and a mass of approximately 1.675×10⁻²⁷ kg (about 1 amu), slightly greater than that of a proton. Neutrons were discovered by James Chadwick in 1932. The number of neutrons in an atomic nucleus, together with the number of protons, determines the mass number and isotope identity.
Key Facts
Frequently Asked Questions
A neutron is a subatomic particle found in the nucleus of all atoms except the most common isotope of hydrogen. It has no electric charge and a mass of approximately 1.675×10⁻²⁷ kg (about 1 amu), slightly greater than that of a proton. Neutrons were discovered by James Chadwick in 1932. The number of neutrons in an atomic nucleus, together with the number of protons, determines the mass number and isotope identity.