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A monatomic ion is an ion consisting of a single atom. A type I binary ionic compound contains a metal (cation) that forms only one type of ion. A type II ionic compound contains a metal that forms more than one type of ion, i.e., ions with different charges
Common Monatomic Ions
| Common Type I Cations | |
|---|---|
| hydrogen | H+ |
| lithium | Li+ |
| sodium | Na+ |
| potassium | K+ |
| cesium | Cs+ |
| beryllium | Be2+ |
| magnesium | Mg2+ |
| calcium | Ca2+ |
| barium | Ba2+ |
| aluminum | Al3+ |
| silver | Ag+ |
| zinc | Zn2+ |
| Common Anions | |
|---|---|
| hydride | H- |
| fluoride | F- |
| chloride | Cl- |
| bromide | Br- |
| iodide | I- |
| oxide | O2- |
| sulfide | S2- |
| nitride | N3- |
| phosphide | P3- |
| Common Type II Cations | ||
|---|---|---|
| Systemic Name | Ion | Alternate Name |
| iron(III) | Fe3+ | ferric |
| iron (II) | Fe2+ | ferrous |
| copper (II) | Cu2+ | cupric |
| copper (I) | Cu+ | cuprous |
| cobalt (III) | Co3+ | cobaltic |
| cobalt (II) | Co2+ | cobaltous |
| tin (IV) | Sn4+ | stannic |
| tin (II) | Sn2+ | stannous |
| lead (IV) | Pb4+ | plumbic |
| lead (II) | Pb2+ | plumbous |
| mercury (II) | Hg2+ | mercuric |
| mercury (I) | Hg22+* | mercurous |
See also
"Monatomic ion"