iron group

== English == === Noun === iron group Any of several groupings of elements that share traits with iron in one way or another. Row 4 (period 4) of the periodic table, or a large subset thereof. A smaller subset thereof comprising iron, cobalt, and nickel. Synonym: iron triad (inorganic chemistry) Group 8 of the periodic table, comprising iron, ruthenium, osmium, and hassium. ==== Translations ====