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
Black Element Software Black Element Software Black Element Software Co., LTD is a Czech video game developer based in Prague, Czech Republic. Prior to their acquisition by Bohemia Interactive Studio in 2010, they developed computer and console games directly. Black Element Software was founded in 2000 by the members of Insanity, known for their games Testament and Testament II. They released their first game, "", on 1 October 2004. In 2005, they joined with Bohemia Interactive Studio and Altar Games to form IDEA Games, which functioned as a publisher and consultant for several independent developers. On 30 September 2010, Black Element Software was