noun🔗ShareNeutronesA 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. "El núcleo de un átomo de helio contiene dos protones y dos neutrones.physicselementpartsciencechemistryenergymassChat with AIVocabulary GamePractice Reading
