Anion - definição. O que é Anion. Significado, conceito
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O que (quem) é Anion - definição

ATOM OR MOLECULE IN WHICH THE TOTAL NUMBER OF ELECTRONS IS NOT EQUAL TO THE TOTAL NUMBER OF PROTONS, GIVING THE ATOM A NET POSITIVE OR NEGATIVE ELECTRICAL CHARGE
Cation; Anion; Anionic; Cationic; Ions; Negative ions; Cations; Anions; Ion (physics); Negative atomic ion; Charge (chemistry); Oxo anion; Ion (chemistry); Ion notation; Nonionic; Negative ion; Positive ions; Cathion; Kation; Ionical; Ionic charge; Positive ion; Non-ionic; Free floating electrons; Anions and cations; Cations and anions
  • Avalanche effect between two electrodes. The original ionization event liberates one electron, and each subsequent collision liberates a further electron, so two electrons emerge from each collision: the ionizing electron and the liberated electron.
  • Schematic of an ion chamber, showing drift of ions. Electrons drift faster than positive ions due to their much smaller mass.<ref name = "knoll"/>
  • −}} ions.
  • [[Hydrogen atom]] (center) contains a single [[proton]] and a single [[electron]]. Removal of the electron gives a cation (left), whereas the addition of an electron gives an anion (right). The hydrogen anion, with its loosely held two-electron cloud, has a larger radius than the neutral atom, which in turn is much larger than the bare proton of the [[cation]]. Hydrogen forms the only charge-+1 cation that has no electrons, but even cations that (unlike hydrogen) retain one or more electrons are still smaller than the neutral atoms or molecules from which they are derived.
  • Equivalent notations for an [[iron]] atom (Fe) that lost two electrons, referred to as [[ferrous]].
  • Mixed Roman numerals and charge notations for the [[uranyl]] ion. The oxidation state of the metal is shown as superscripted Roman numerals, whereas the charge of the entire complex is shown by the angle symbol together with the magnitude and sign of the net charge.
  • 2NO3-}}). The 3-dimensional shell represents a single arbitrary [[isopotential]].

Anion         
The electro-negative element or radical of a molecule, such as oxygen, chlorine or the radical sulphion. (See Ions.) It is the portion which goes to the anode, q.v., in electrolytic decomposition.
Anion         
·noun An electro-negative element, or the element which, in electro-chemical decompositions, is evolved at the anode;
- opposed to cation.
anion         
['an???n]
¦ noun Chemistry a negatively charged ion. The opposite of cation.
Derivatives
anionic adjective
Origin
C19: from anode or ana-, + ion.

Wikipédia

Ion

An ion () is an atom or molecule with a net electrical charge. The charge of an electron is considered to be negative by convention and this charge is equal and opposite to the charge of a proton, which is considered to be positive by convention. The net charge of an ion is not zero because its total number of electrons is unequal to its total number of protons.

A cation is a positively charged ion with fewer electrons than protons while an anion is a negatively charged ion with more electrons than protons. Opposite electric charges are pulled towards one another by electrostatic force, so cations and anions attract each other and readily form ionic compounds.

Ions consisting of only a single atom are termed atomic or monatomic ions, while two or more atoms form molecular ions or polyatomic ions. In the case of physical ionization in a fluid (gas or liquid), "ion pairs" are created by spontaneous molecule collisions, where each generated pair consists of a free electron and a positive ion. Ions are also created by chemical interactions, such as the dissolution of a salt in liquids, or by other means, such as passing a direct current through a conducting solution, dissolving an anode via ionization.

Exemplos do corpo de texto para Anion
1. Also it activates hematopexin by anion in blood to stop bleeding quickly.
2. An anion, described as an ionic species with a negative charge, plays an important role in checking air pollution.
3. The Ministry of Public Health adorns its stand with an anion water generator containing clear water of the Lake Chon on Mt.
4. The multipurpose lamp, made in Korea, will remove pollutants from the air such as cigarette smoke, carbon monoxide, sulfuric gas and others. «The therapeutic lamp is an anion making cleanser which will not only give the required light but will also electrically neutralize and remove the pollutants in the air ,» K.B.