The noble gases are generally non-reactive because they have fully filled electronic shells, which are extremely stable.
2.
Ti 4 + has a " closed " electronic shell, with the same number of electrons as the inert gas argon.
3.
For the Pauley Pavilion faithful, it made for a more stimulating guessing game than that ol'modern-day sports standby, the electronic shell game.
4.
For a main group element, the valence electrons are defined as those electrons residing in the electronic shell of highest principal quantum number n.
5.
It is believed ( though no proof exists ) that much silicon substitutes for carbon thus becoming invisible to most spectroscopic techniques because silicon and carbon atoms have the same configuration of the outer electronic shells.
6.
It arises from a subtle interplay of electronic and nuclear spins : at ultra-low temperatures and corresponding excitation energies, the half-integer total spin of the electronic shell and half-integer total spin of the nucleus are coupled by a very weak hyperfine interaction.
7.
"' Walter Alexander " Walt " de Heer "'( born November 1949 ) is a Dutch physicist and nanoscience researcher known for discoveries in the electronic shell structure of metal clusters, magnetism in transition metal clusters, field emission and ballistic conduction in carbon nanotubes, and graphene-based electronics.
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