noun🔗Share중성자A 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. "헬륨 원자핵은 두 개의 양성자와 두 개의 중성자를 포함한다.physicselementpartsciencechemistryenergymassChat with AIVocabulary GamePractice Reading