- Neutrons were first discovered in the 1930s as an answer to the
energy conservation failing in an ionization chamber experiment.
- Neutrons and protons are the basic constituents of atomic
nuclei. They are very similar in most ways apart from electric
charge, and are thus collectively known as NUCLEONS.
Topics in this section
Properties of the neutron
The Chart of the Nuclides.
Drag the cursor over the graph to change the selected area. This
plots all known nuclides as a function of Z and N. Stable nuclides are in
pink; radioactive ones in mauve.
more detailed version of
this chart is given at BNL