cation

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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 ?
Common cationic polyacrylamides produced industrially Include copolymers of acrylamide (1) with AETAC (6), MAETAC (7), MAPTAC (9), or DADMAC (10) (Figures 7 and 2).
Mirage Inks has been granted ISEGA certification For several of its Quartz cationic UV ink systems for use in indirect food contact applications.
67 which shows that it is a stable peptide and the total cationic residues are 5.
Another way to circumvent the water sensitivity of the cationic process consisted in performing the reaction in bulk via a photochemical initiation.
Willard stated that "Energy curing is a well-understood science, with significant growth opportunity, free radical chemistry dominates cationic chemistry, and there is a wide variety of different base chemistries available to the formulator.
Vaxfectin is a novel, second-generation, cationic lipid-based adjuvant optimized by Vical to increase the immune response in DNA vaccines.
The report includes cationic starch description, covers its application areas and related patterns.
Vendor need to be pre-qualifed and able to provide the following products: Zetag 8848fs WE-1505 Praestol K275FLX Furnish and Deliver Cationic Emulsion Polymer to Districts Joint Water Pollution Control Plant (JWPCP), and Lancaster and Palmdale Water Reclamation Plants (WRPs).
Then their surfaces were modified by cationic albumin.
BASF Coatings GmbH has obtained a patent for a method of making an electrocoat composition, which is 5% to 35% by weight solids, comprised of combining at least one binder comprised of at least one group that is a potentially cationic ammonium group and/or cationic ammonium group, and one or more reactive functional groups which with complementary reactive functional groups in a crosslinking agent are able to undergo thermal crosslinking reactions, at least one crosslinking agent comprised of the complementary reactive functional groups, from 0.

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