Molybdenum

Molybdenum discovered in by 1778 Carl Welhelm Scheele while working with the mineral as molybdenite. Molybdenum metal was prepared in an impure form in 1782 by Peter Jacob Hjelm [6].

From the Greek word "molybdos" meaning "lead". Molybdenite was mistakenly taken for a lead and graphite ore [6].