Assertion: atom's proton | /r/HasProperty | quark
Facets:
value: with a charge of −1/3
type: OTHER
Source sentences:
text: Several other scientists furthered the atomic model, including Niels Bohr (built upon Rutherford's model to include properties of electrons based on the hydrogen spectrum), Erwin Schrödinger (developed the quantum model of the atom), Werner Heisenberg (stated that one cannot know both the position and velocity of an electron simultaneously), and Murray Gell-Mann and George Zweig (independently developed the theory that protons and neutrons were composed of quarks).
text: A proton is made of two up quarks and one down quark and a neutron is made of two down quarks and one up quark.
text: Protons are composed of two up quarks (each with charge +2/3) and one down quark (with a charge of −1/3).
text: Protons are composed of two up quarks (each with charge +2/3) and one down quark (with a charge of −1/3).