proton
/ˈprəʊtɒn/noun
- Physics a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron【物理】质子。
The mass of the proton is 1,836 times greater than that of the electron. The atoms of each chemical element have a characteristic number of protons in the nucleus; this is known as the atomic number. The common isotope of hydrogen has a nucleus consisting of a single proton.
派生词
protonic
adjective词源
1920s: from Greek，neuter of prōtos 'first'.