cation


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Related to cation: anion

cation

(kăt'ī`ən), atom or group of atoms carrying a positive charge. The charge results because there are more protons than electrons in the cation. Cations can be formed from a metal by oxidation (see oxidation and reductionoxidation and reduction,
complementary chemical reactions characterized by the loss or gain, respectively, of one or more electrons by an atom or molecule. Originally the term oxidation
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), from a neutral base (see acids and basesacids and bases,
two related classes of chemicals; the members of each class have a number of common properties when dissolved in a solvent, usually water. Properties
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) by protonation, or from a polar compound by ionization. Cationic species include Na+, Mg++, and NH4+. The cations of the transition elementstransition elements
or transition metals,
in chemistry, group of elements characterized by the filling of an inner d electron orbital as atomic number increases.
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 have characteristic colors in water solution. Saltssalt,
chemical compound (other than water) formed by a chemical reaction between an acid and a base (see acids and bases). Characteristics and Classification of Salts

The most familiar salt is sodium chloride, the principal component of common table salt.
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 are made up of cations and anionsanion
, atom or group of atoms carrying a negative charge. The charge results because there are more electrons than protons in the anion. Anions can be formed from nonmetals by reduction (see oxidation and reduction) or from neutral acids (see acids and bases) or polar compounds
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. See ionion,
atom or group of atoms having a net electric charge. Positive and Negative Electric Charges

A neutral atom or group of atoms becomes an ion by gaining or losing one or more electrons or protons.
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.

cation

[′kat‚ī·ən]
(chemistry)
A positively charged atom or group of atoms, or a radical which moves to the negative pole (cathode) during electrolysis.

cation

a positively charged ion; an ion that is attracted to the cathode during electrolysis
References in periodicals archive ?
Cation exchange sites in SOM arise from the dissociation of weakly acidic functional groups, particularly carboxylic and phenolic groups (Thomas and Hargrove 1984).
It is found that the maximum and equilibrium water absorbency decreases with increasing ionic strength of solution containing multivalent cation as shown in Figs.
This could cause an increase in cation adsorption capacity of CSA as compared to RHA.
Acid base status, renal function, water, and macromineral metabolism of dry cows fed diets differing in cation anion difference.
And once they are fully registered, they will be able to see current entries, results awaiting certi cation and certi cated results.
Less information, however, is available for a combined investigation of cation exchange and nitrogen dynamics in undisturbed soil under unsaturated conditions.
The gas-phase lithium, sodium, and potassium cation basicities (LCB, SCB, and PCB, respectively) are defined as the Gibbs free energies associated with the thermodynamic equilibria:
In the demonstration, present a proton as a colored paperclip not already representing a cation such as a pink one, and have many of these pink paperclips take the place of cation paperclips.
Potassium is a major intracellular cation and is usually present in serum in a relatively narrow range of approximately 3.
It is expected that enhanced cation interactions with deprotonated
Cal State Northridge's teams face Big West Conference road showdowns, with the women in cation tonight at Cal State Fullerton and Sunday at UC Riverside and the men meeting UC Santa Barbara on Saturday.
2+] inhibits NMDAR function is by binding to a divalent cation site associated with the glycine site and allosterically inhibiting glycine binding (Hashemzadeh-Gargari and Guilarte 1999).