| 单词 | proton |
| 释义 | proton —protonic, adj. /proh"ton/, n. Physics, Chem. a positively charged elementary particle that is a fundamental constituent of all atomic nuclei. It is the lightest and most stable baryon, having a charge equal in magnitude to that of the electron, a spin of 1/2, and a mass of 1.673 × 10-27 kg. Symbol: P [1915-20; n. use of Gk prôton, neut. of prôtos FIRST] |
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