electron shell

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Noun1.electron shell - a grouping of electrons surrounding the nucleus of an atom; "the chemical properties of an atom are determined by the outermost electron shell"
group, grouping - any number of entities (members) considered as a unit
References in periodicals archive ?
Rutherford within the framework of classical mechanics and electrodynamics planetary nuclear model of the atom, containing in the central part of the positively charged nucleus and around the periphery of a negatively charged electron shell of a sphere-like, had a significant and insurmountable flaw.
This nuclear clock will be fundamentally different from existing atomic clocks, which are based on transitions in the electron shell.
Each type of atom is unique because the different atoms have different numbers of protons in the nucleus, and different electron shell (layer) configurations.
As each element has a unique combination of electron shell energy levels, the spectrum of emitted x-rays is characteristic of the elements contained in the sample.
After having passed a polarizer cube and a lambda-quarter-plate, the laser light is circularly polarized and is then absorbed by the metastable atoms; in this absorption-process, the angular momentum of the photon is transferred to the electron shell of the atom.
6) A full electron shell would then be an individual with a moderately well delimited spatio-temporal locus, net charge of some multiple of -e, net momentum and spin and other measurable properties.
Therefore, we can assume that the protons of alpha-particles leaving the nucleus are associated with the second electron shell (the first one has only two electrons).
Most materials are either ferromagnetic or ferroelectric based on the number of electrons in the ion's outer electron shell.
Atoms naturally have a positive or negative charge, depending on the number of electrons in the outer electron shell.
In the study reported in PNAS, the researchers found that the clusters were stable because the surface gold atoms in the core each had at least one surface-chemical bond and the gold core exhibited a strong electron shell closing.

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