vice.elements.element.stable_isotopes ===================================== Type : ``list`` of integers The mass numbers (protons and neutrons) of the stable isotopes of this element. .. versionadded:: 1.1.0 Example Code ------------ >>> import vice >>> vice.elements.Fe.stable_isotopes [54, 56, 57, 58] >>> vice.elements.Mg.stable_isotopes [24, 25, 26]