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 ?
They found that cation diffusion is slow at low levels of disorder.
Effect of dietary cation anion difference on incidence post parturient problems of transition Sahiwal dairy cattle.
This is done by introducing different cations (positively charged ions) into the crystal structure of the perovskite.
Hence, there is currently no equivalent equation to explain soil dispersion on the basis of specific exchangeable cation effects.
In their seminal study of cation effects on soil permeability, Quirk and Schofield (1955) defined the cation concentration low enough to result in a 10% to 15% reduction in the saturated hydraulic conductivity, after leaching with water of known composition for a prescribed time-period, as the threshold concentration (TEC).
In summary, the size and the configuration of the crown ether were key factors to influence the oxygen-binding and catalytic oxidation activities of the complexes, and the well complexation of alkaline cation with the crown ether will favor the oxygen-binding and catalytic oxidation activities.
6, a scheme representing the structural reorganization inside the gel in the swelling process of sample in salt solution containing multivalent cation is shown.
Where D represents the distribution ratio of the cation between the aqueous phase and the organic phase.
e] (mg/g) is the amount of adsorbed target cation at equilibrium, [C.
Changing dietary cation anion difference for dairy cows fed with two contrasting levels of concentrate in diets.
There was interest to study such properties of received phosphate cation-exchange resin as sorption ability to ions of copper, nickel, calcium, sodium, cobalt and uranyl; to study influence of various factors on process sorption of these cations, and also their mechanism of sorption with application of the IR-spectroscopical analysis.