noun🔗ShareNeutronsA 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."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.physicselementpartsciencechemistryenergymassChat with AIVocabulary GamePractice Reading
