noun 다운로드 🔗공유 양성자 A 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. Examples : "The number of protons in an atom's nucleus defines what element it is. " 원자핵 속 양성자 수는 어떤 원소인지 결정한다. physics chemistry element science energy substance structure technical compound AI와 채팅어휘 게임독해 연습