valence number

valence number

[′vā·ləns ‚nəm·bər]
(chemistry)
A number that is equal to the valence of an atom or ion multiplied by +1 or -1, depending on whether the ion is positive or negative, or equivalently on whether the atom in the molecule under consideration has lost or gained electrons from its free state.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
It is clear from the Levine's modifications as well as Phillips and Van Vechten theory that the value of homopolar energy gaps ([E.sub.h]) depends upon the nearest-neighbour distance, while heteropolar energy gaps ([E.sub.c]) is function of nearest-neighbour distance and valence number of electrons taking part in bond formation.
where, a and b are constants, r(AC) is the interatomic distance between A and C atoms, [Z.sub.A], [Z.sub.c] and [r.sub.A], [r.sub.c] are the valence numbers of electrons, covalent radii of A and C atoms, respectively, and [K.sub.s] is the Thomas-Fermi screening parameter.

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