Given the task definition and input, reply with output. In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

When bonded to Iodine, this element can react with alkenes to form cyclopropanes in the Simmons-Smith reaction. In the Clemmensen reduction, an amalgamate of this element is reacted with hydrochloric acid to form alkanes. Ions of this element are bonded to residues of cysteine and histidine in "treble clefs" and "gag knuckles", which can recognize DNA and package RNA, functions of this element's namesake fingers. This metal is utilized in the galvanization of steel, and pennies made after 1982 are mostly comprised of this metal. For 10 points, name this element with atomic number 30, which can combine with copper to form brass.
Science