Mendelevium is an element with the symbol Md (formerly Mv) and the atomic number 101. It was named after Dimitri Ivanovich Mendeleev, who was responsible for the Periodic Table. Mendeleev's periodic system is the fundamental way to classify all the chemical elements. The name "mendelevium" was accepted by the International Union of Pure and Applied Chemistry (IUPAC). On the other hand, the proposed symbol "Mv" submitted by the discoverers was not accepted, and the IUPAC selected "Md" instead.