Elementary particle that possesses the unit quantum of negative electric charge. In an electrically neutral atom, the number of electrons in the electron cloud equals the number of protons in the nucleus.
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electron microscope (Machine with a system of magnification that focuses beams of electrons to permit much greater ...)
ESR dating (Abbreviation for electron spin resonance dating, a chronometric dating method based on the ...)
ion (Any atom or small molecule that has an unequal number of electrons and protons; ions with an ...)
micro-spectrophotometry (Ablation of a specimen using an electron microscope; the electrons that are focused on a ...)