Rhenium was discovered in 1925 by Walter and Ida Noddack with the help of Otto Berg. It was named after the river Rhine in Germany. It was one of the last elements to be discovered that had a stable isotope at such a large size. Most of the ores mined for Rhenium come from Chile and it is a very rare metal. One Kilo of Rhenium can cost upwards of 4500 USD. Its most common use is in producing jet engines due to its high melting and boiling point. It is a solid metal at room temperature with a melting point of 3185°c and a boiling point of 5597°c.
Walter Noddack, Ida Tacke, Otto Berg