Assertion: hydrogen's nucleus | /r/MadeOf | single proton
Facets:
Source sentences:
text: Because the nucleus of this isotope consists of only a single proton, it is given the formal name protium.
text: The nucleus of ordinary hydrogen consists of a single proton, but it also occurs as deuterium with a proton and a neutron.
text: Because the nucleus of this isotope consists of only a single proton, it is given the formal name protium.
text: The nucleus of hydrogen consists of only a single proton (in the case of hydrogen-1 or protium), or it may also include one or more neutrons (giving deuterium, tritium, and other isotopes).