| Revision as of 12:42, 2 April 2019 editJorge Stolfi (talk | contribs)Autopatrolled, Extended confirmed users, Rollbackers27,608 edits Starting to create a full iron(II) article about iron in the 2+ oxidation stateTag: Removed redirect← Previous edit | Latest revision as of 20:43, 22 June 2024 edit undoChristian75 (talk | contribs)Extended confirmed users, New page reviewers, Pending changes reviewers, Rollbackers114,675 edits {{R with history}} | ||
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| In ], '''iron(II)''' refers to the ] ] in its +2 ]; meaning an atom of iron that has lost two of its electrons. In ] (salts), such an atom may occur as a separate ] (positive ion) denoted by '''Fe<sup>2+</sup>'''. | |||
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| The adjective '''ferrous''' or the prefix '''ferro'''- is often used to specify such compounds — as in "ferrous chloride" for ], {{chem2|FeCl2}}. The adjective "ferric" is used instead for ] salts, containing the cation or Fe<sup>3+</sup>. The word ferrous is derived from the ] word ''ferrum'' for iron. | |||
| Iron(II) atoms may also occur as ]es, such as the polymer ] ], {{chem2|''n''}} or {{chem2|''n''}}; and ]s, such as the neutral molecule ], {{chem2|Fe(C2H5)2}} or {{chem2|2}}. | |||
| Iron is almost always encountered in the oxidation states 0 (as in the metal), +2, or +3. Solid iron(II) salts are relatively stable in air, but in the presence of air and water they tend to ] to iron(III) salts that include ] ({{chem2|HO(-)}}) or ] ({{chem2|O(2-)}} anions. | |||
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