| 单词 | electron pair |
| 释义 | electron /i-lekˈtron/noun
ORIGIN: Gr ēlektron amber electron beam noun A stream of electrons, esp in a cathode-ray tube electron camera noun Any device that converts an optical image into a corresponding electric current directly by electronic means electron capture noun The capture of an electron by the nucleus of its own atom, the change of a proton into a neutron decreasing by one the atomic number of the atom electron diffraction noun The diffraction of a beam of electrons by crystal, used in the study of crystal structures electron gun noun The arrangement of electrodes in a cathode-ray tube which produces the electron beam electron lens noun A device for focusing an electron beam electron micrograph noun A photograph obtained by substituting a photographic plate for the fluorescent viewing screen of an electron microscope electron microscope noun A microscope that makes use of a beam of electrons instead of light electron optics singular noun The study of the effects of electric and magnetic fields on the direction of beams of electrons electron pair noun Two valence electrons shared by adjacent nuclei, so forming a bond electron probe noun An X-ray device that bombards the specimen under examination with a very narrow beam of electrons, allowing non-destructive analysis electron ring accelerator noun An accelerator in which an intense ring of circulating electrons, being accelerated, can carry along and accelerate protons or stripped ions electron shell noun A group of electrons surrounding a nucleus of an atom and having adjacent energy levels electron telescope noun An optical instrument with electronic image converter used with a normal telescope electron tube noun An electronic device in which the electron conduction is in a vacuum or gas inside a gas-tight enclosure, eg a thermionic valve elecˈtronvolt noun A unit of energy equal to that acquired by an electron when accelerated by a potential of one volt |
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