noun🔗Shareप्रोटॉनA 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. "हाइड्रोजन परमाणु के नाभिक में केवल एक प्रोटॉन होता है।physicselementchemistryscienceChat with AIVocabulary GamePractice Reading