What element has the symbol 'Mo'?

The story behind the answer

Mo is the symbol for molybdenum. Moscovium’s symbol is Mc, “Molonium” isn’t an element, and monazite is a mineral, not an element. So the only correct match is molybdenum.

Molybdenum (atomic number 42) is a hard, silvery transition metal prized for strengthening steel and boosting heat and corrosion resistance—vital in turbines and engines. It’s commonly found in the mineral molybdenite (MoS2). Its name comes from the Greek “molybdos” (lead) because it was long confused with lead ores; it was isolated in 1781. Your body even needs trace amounts for enzymes that process nitrogen and sulfur. Memory tip: “Mo = Mo-lybdenum,” and think “Mo adds mojo to steel.”