Assertion: tritium's proton | /r/HasProperty | even-neutron
Facets:
Source sentences:
text: The majority of stable nuclides are even-proton-even-neutron, where all numbers Z, N, and A are even.
text: As the soup cooled slightly, deuterium nuclei then paired to become helium (two protons, two neutrons), while single protons lived on as isolated hydrogen nuclei.