Icon class icon_class fas fa-quote-left icon_class_computed fas fa-quote-left Related content Protons are spin-1/2 fermions and are composed of three valence quarks, making them baryons Source Wikipedia Copyright information Text from Wikipedia and Wiktionary web pages quoted for educational purposes is subject to the Wikipedia Creative Commons Attribution ShareAlike Licence Snippet kind INFO Previous snippet Full quote Hadrons contain, along with the valence quarks that contribute to their quantum numbers, virtual quark–antiquark pairs known as sea quarks. URL https://en.wikipedia.org/wiki/Quark#Sea_quarks Next snippet Related snippets Related snippets (backlinks) The quarks that determine the quantum numbers of hadrons are called valence quarks; apart from these, any hadron may contain an indefinite number of virtual "sea" quarks, antiquarks, and gluons, which do not influence its quantum numbers. Visit also Visit also (backlinks) Flags