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? their colour revealed is the winner and advances to the new final round, "The Vortex". The Vortex is "a true test of skill, nerve and judgment". It consists of a "mini velodrome" which flashes between red and black at a constant rate. The aim is to watch the sequence and adjust the power of the launcher, which will fire a ball into The Vortex. If the balls lands in the End Zone in the contestant's chosen colour, they win the jackpot (starting at £500,000), or else it will increase by £500,000 for the next show. Notes The coloured backgrounds denote