| 单词 | electron |
| 释义 | electron /i lek"tron/, n. 1. Also called negatron. Physics, Chem. an elementary particle that is a fundamental constituent of matter, having a negative charge of 1.602 × 10-19 coulombs, a mass of 9.108 × 10-31 kilograms, and spin of 1/2, and existing independently or as the component outside the nucleus of an atom. 2. Elect. a unit of charge equal to the charge on one electron. [term first suggested in 1891 by Irish physicist G. J. Stoney (1826-1911); ELECTR(IC) + -on (from the names of charged particles, as ION, CATION, ANION) with perh. accidental allusion to Gk élektron amber (see ELECTRIC)] |
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