noun Télécharger 🔗Partager Neutrons A subatomic particle forming part of the nucleus of an atom and having no charge; it is a combination of an up quark and two down quarks. Examples : "The nucleus of a helium atom contains two protons and two neutrons. " Le noyau d'un atome d'hélium contient deux protons et deux neutrons. physics element part science chemistry energy mass Chat avec IAJeu de vocabulairePratiquer la lecture