Up quark

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A topic known well beyond its field, found in many languages.

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Notion

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Science and technology

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What Wikipedia says

The up quark or u quark (symbol: u) is the lightest of all quarks, a type of elementary particle, and a significant constituent of matter. It, along with the down quark, forms the neutrons (one up quark, two down quarks) and protons (two up quarks, one down quark) of atomic nuclei.

Excerpt from the Wikipedia article “Up quark”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: user:MissMJ, CC BY 3.0, via Wikimedia Commons.