An ion with a negative charge.
Flexable is mostly correct but it is wrong to say that all anions are always nonmetallic.Anions do not have to be simple, i.e. they can be composed of a number of atoms, e.g. chromate (CrO42-) and in this way it would be incorrect to say that they are either metallic or nonmetallic.Sorry to be a pedantic asshole but I guess that's what science is all about.
An"i*on (#), n. [Gr. , neut. , p. pr. of to go up; up + to go.] Chem.
An electro-negative element, or the element which, in electro-chemical decompositions, is evolved at the anode; -- opposed to cation.
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© Webster 1913.
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