Assertion: atom's neutron | /r/MadeOf | two down quarks
Facets:
value: with a positive 2/3 charge
type: OTHER
value: like protons
type: OTHER
Source sentences:
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: Then, because electrons are leptons, and protons, and neutrons are made of quarks, this definition in turn leads to the definition of matter as being "quarks and leptons", which are two of the four types of elementary fermions (the other two being antiquarks and antileptons, which can be considered antimatter as described later).
text: Like protons, neutrons are also made of quarks — one "up" quark (with a positive 2/3 charge) and two "down" quarks (each with a negative one-third charge).
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 neutron is made of two down quarks and one up quark.
text: A neutron is made of two down quarks and one up quark.