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| physical object > natural object > particle > charged particle > nucleus > nuclide |
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| nuclide comparison table | ||
| Subject | has definition | is a kind of |
|---|---|---|
| nucleus | The massive, positively charged central part of an atom, composed mainly of protons and neutrons, around which the electrons revolve. The radius of an atomic nucleus is directly proportional to the cube root of its mass. Density at least 1014 g cm-3. Radius 10-12-10-13 cm. | charged particle |
| nuclide | A species of atomic nucleus, analogous to the word "isotope" for a species of atom. The word is also used to distinguish between atomic nuclei that are in different energy states. | nucleus |