Closed Shell

Some articles on shell, closed shell, closed:

Valence Electron - Chemical Reactions
... electrons in an atom's outermost valence shell governs its bonding behavior ... hydrogen or helium) tends to react to form a closed shell, corresponding to the following electron configuration s2p6 ... lost to form a positive ion (cation) with a closed shell (e.g ...
Octet Rule - Explanation in Quantum Theory
... the atom explains the eight electrons as a closed shell with an s2p6 electron configuration ... A closed-shell configuration is one in which low-lying energy levels are full and higher energy levels are empty ... For example the neon atom ground state has a full n=2 shell (2s2 2p6) and an empty n=3 shell ...
Open Shell
... In the context of atomic orbitals, an open shell is a valence shell which is not completely filled with electrons or that has not given all of its valence electrons through chemical bonds with other atoms or ... chemistry implementations of molecular orbital theory, open shell molecules have to be handled by either the restricted Open-shell Hartree-Fock method or the unrestricted Hartree-Fock method ... Likewise a closed shell or closed shell configuration is obtained with a completely filled valence shell ...
USS Benjamin Stoddert (DDG-22) - 1970s
... Sailing for Hong Kong on 29 December, Benjamin Stoddert’s crew closed the year with liberty in that city ... As the warships closed the port, Stoddert’s electronic warfare unit registered signals from an enemy fire-control radar, followed almost immediately by the launch of two surface-to-surface missiles ... When enemy gunfire started falling close aboard, including several air bursts that sprayed shell fragments near the warship, Benjamin Stoddert returned double salvos ...

Famous quotes containing the words shell and/or closed:

    There are no small number of people in this world who, solitary by nature,
    always try to go back into their shell like a hermit crab or a snail.
    Anton Pavlovich Chekhov (1860–1904)

    With two sons born eighteen months apart, I operated mainly on automatic pilot through the ceaseless activity of their early childhood. I remember opening the refrigerator late one night and finding a roll of aluminum foil next to a pair of small red tennies. Certain that I was responsible for the refrigerated shoes, I quickly closed the door and ran upstairs to make sure I had put the babies in their cribs instead of the linen closet.
    Mary Kay Blakely (20th century)