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 Red White ten plants of this kind in the world. The large-scale production lowers costs and allows them to offer very low prices. The company has branches in Poland, Slovakia, Ukraine and overseas (United States, Canada). It is owned by Polish millionaire Tadeusz Chmiel. Black Red White Black Red White is a leading furniture manufacturer in Poland, founded in Chmielek, Poland in 1991. The company's headquarters are located in Biłgoraj. Black Red White S.A. is the biggest Polish manufacturer of traditional and new furniture systems, home and office furniture, and upholstered fittings made of furniture panels, MDF and solid wood. BRW S.A.