Quark Chart

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Electric charge in proton units.

Quark Masses:

Quark masses are labeled "approximate mass". It is very difficult to determine its mass or to even define what is meant by quark mass, because a quark cannot be isolated.

This is especially true for the lightest generation (u and d), since most of the mass of their composites (such as protons and neutrons) does not come from quark masses, but from the confinement energy.

Quark Interactions | Units | Composites (Hadrons)
Top Quark | Flavor

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Link to the lepton chart.