Packet 10: Tossup 4

An oxide hydroxide of this element reinforces the teeth of limpets, the strongest known biological material. Elements that bind to this element during planetary differentiation are called siderophiles. This is (15[1])the most abundant element found in meteorites that display (15[1])Widmanstätten patterns. The introduction of oxygen (15[1])to Earth’s atmosphere produced (*) “banded” formations of this element. (10[3])Pyrite consists of sulfur and (10[2])this element, (10[1])whose primary ores include (-5[1])magnetite and hematite. Depending on (10[1])if its oxidation state is plus 2 or plus 3, (10[1])this element is “ferrous” or “ferric.” (10[3])For 10 points, name this transition metal found in rust. ■END■ (10[4]0[2])

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