What is the formula of ferrous ion?


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Ferrous (Fe2+), in chemical science, indicates a bivalent iron compound
(+2 oxidation state), as opposed to ferric,
which indicates a trivalent iron compound (+3
oxidation state).[1]Outside of chemical science, ferrous is an adjective used to indicate
the presence of iron.[1] The word is derived from the Latin word ferrum
("iron").[2] Ferrous metals include steel and pig iron
(with a carbon content of a few percent) and alloys of
iron with other metals (such as stainless steel).

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