Cation Naming Flow Chart

Cation Naming Flow Chart - Cations (Positive Ions)...

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Unformatted text preview: Cations (Positive Ions) Monoatomic Polyatomic Only One Ion Possible More Than One Ion Possible Rule: Name of element + "ion" Rule: (a) newer rule - positive charges indicated by a Roman numeral Examples: Na+ Mg2+ H+ K+ Sr2+ Cs+ Ca2+ sodium ion magnesium ion hydrogen ion potassium ion strontium ion cesium ion calcium ion Comment: The number of positive charges is NOT indictated in the name because it is not necessary. These ions NEVER take on two possible positive charges. Comment: Hydrogen will take on a negative one charge (see monoatomic anions for naming. Examples: Fe2+ Fe3+ Cu+ Cu2+ Examples: NH4+ Hg22+ iron(II) ion iron(III) ion copper(I) ion copper(II) ion (b) older rule (but still used) - Latin stem + "ous" for the lesser charge. Latin stem + "ic" for the greater charge. Examples: Fe2+ Fe3+ Cu+ Cu2+ Sn2+ Sn4+ Rule: ?? ammonium mercury(I) ion or mercurous ion Comment: Hg22+ is two Hg+ ions bonded together, like this: Hg+—Hg+ However, Hg+ by itself does not exist, therefore mercury(I) ion is Hg22+ (Also, Hg2+ is mercury(II), but that is a monoatomic ion.) ferrous ion ferric ion cuprous ion cupric ion stannous ion stannic ion ...
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This note was uploaded on 05/04/2009 for the course CHEM 653196 taught by Professor Johnson during the Spring '09 term at UCSD.

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