What element has the symbol 'Md'?

The story behind the answer

Mendelevium (Md) is element 101. The symbol Md uniquely identifies Mendelevium; the other options have different symbols: Mercury is Hg, Molybdenum is Mo, and Manganese is Mn.

Named after Dmitri Mendeleev, creator of the periodic table, Mendelevium is a synthetic, radioactive actinide first produced in 1955 at Berkeley by bombarding einsteinium with alpha particles—so rare it’s studied atom-by-atom. Memory tip: think “Mendeleev’s element” and match his name to Md—MenDeleev.