(So named (Latin molybdaena, "lead") in 1781 by K. W. Scheele after its isolation by P. J. Hjelm) A very hard, lustrous, silver-white metallic chemical element, used in alloys, points for spark plugs, etc.

Symbol: Mo
Atomic number: 42
Atomic weight: 95.94
Density (at room temperature and pressure): 10.2 g/cc
Melting point: 2,620°C
Boiling point: 4,600°C
Valence: +3, +6
Ground state electron configuration: [Kr]4d55s1