Assertion: hydrogen atom's nucleus | /r/MadeOf | four neutrons
Facets:
value: at the center of an atom
type: LOCATION
Source sentences:
text: The nucleus consists of a proton and four neutrons.
text: The atomic nucleus is the small, dense region consisting of protons and neutrons at the center of an atom, discovered in 1911 by Ernest Rutherford based on the 1909 Geiger–Marsden gold foil experiment.
text: The nucleus consists of a proton and four neutrons.