rhenium
Heavy, silver-white, metallic element, atomic number 75, relative atomic mass 186.2. It has chemical properties similar to those of manganese and a very high melting point (3,180°C/5,756°F), which makes it valuable as an ingredient in alloys.
It was identified and named in 1925 by German chemists Walter Noddack (1893–1960), Ida Tacke, and Otto Berg from the Latin name for the River Rhine.
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