Chemical element named mendelevium in honor of D.I. Mendeleev, the first to arrange the elements in a periodic manner. Most recently, the synthesis of element 118 (since named oganesson) was reported in October 2006, and the synthesis of element 117 (tennessine) was reported in April 2010. Ten materials familiar to various prehistoric cultures are now known to be chemical elements: Carbon, copper, gold, iron, lead, mercury, silver, sulfur, tin, and zinc. Three additional materials now accepted as elements, arsenic, antimony, and bismuth, were recognized as distinct substances prior to 1500 AD. Phosphorus, cobalt, and platinum were isolated before 1750. Most of the
Red or Black? seven nights in September 2011, running over the course of a week, except for the Tuesday night, from Saturday to the following Saturday. Over 100,000 people applied to compete in the show. In the penultimate round, "Duel", a video wall displayed a disc split into eight sections, numbered 1–8. Before the round started, an independent adjudicator randomised which sections were coloured red or black, with each colour having four sections; this choice was hidden to the contestants. A random player chose their colour, while the other player took the remaining colour. Each player then took it in turns to choose