| 单词 | energy shell |
| 释义 | > as lemmasenergy shell energy shell n. Physics each of a number of discrete sets of orbitals (visualized as concentric shells surrounding the nucleus of an atom) capable of being occupied by electrons having certain energy values; a corresponding structure within a nucleus, occupied by nucleons; = shell n. 19b. ΚΠ 1925 London, Edinb., & Dublin Philos. Mag. 6th Ser. 49 513 The optical spectral lines belong to transitions from a free outer orbit to a vacant place in the outmost energy shell. 1997 Sci. Amer. Dec. 51/3 The same mechanism works for filled proton and neutron energy shells in atomic nuclei and explains their magic numbers. 2008 J. McDowell Metals i. 4 Electrons move rapidly around the nucleus in regions known as energy shells. < as lemmas |
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