Produced through artificial bombardment or fission.
Existing in a long-lived nuclear excited state.
Occurring as a single stable isotope for a given element.
Occurring naturally on Earth though natural cycles.
Originating from before the formation of the Earth.
Spontaneously emitting radiation.
Non-decaying nuclear configuration.
Result of human nuclear synthesis in reactors.
Subject to nuclear transmutation over time.
Qualitative attributes describing the nuclear or environmental behavior of a nuclide.