noun🔗ShareProtonA positively charged subatomic particle forming part of the nucleus of an atom and determining the atomic number of an element, composed of two up quarks and a down quark."The hydrogen atom has only one proton in its nucleus. "L'atome d'hydrogène n'a qu'un seul proton dans son noyau.physicselementchemistryscienceChat with AIVocabulary GamePractice Reading
