Upon heating, this element sublimes from its most common ore, mispickel. This element reacts with zinc metal and sulphuric acid to produce a gas which is then passed along a heated glass tube in the Marsh test for its presence. The yellow allotrope of this element resembles white phosphorus in adopting an unstable tetrahedral arrangement.  In the body, this element can accumulate in the mitochondria and react with lipoic 
Upon heating, this element sublimes from its most common ore, mispickel. This element reacts with zinc metal and sulphuric acid to produce a gas which is then passed along a heated glass tube in the Marsh test for its presence. The yellow allotrope of this element resembles white phosphorus in adopting an unstable tetrahedral arrangement.  In the body, this element can accumulate in the mitochondria and react with lipoic acid, inhibiting the action of pyruvate dehydrogenase. Forming a III-V [three-five] semiconductor with gallium, for ten points, name this element which also appears in salvarsan, Erlich's "magic bullet" for syphilis, despite its extreme toxicity, a non-metal with symbol As.
Upon heating, this element sublimes from its most common ore, mispickel.
{Arsenic} or As