Iron is element 26, a transition metal of the d block, in group 8, period 4. Its ground-state configuration is [Ar] 3d6 4s2, and it usually shows the oxidation states 0, 2, 3.
Iron has been known since antiquity, so no discovery is credited for it.
Name origin: English word (ferrum in Latin).
The periodic table, read every way a chemistry course asks for. This tool needs JavaScript; these are the pages it offers: