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[ ? ] Transuranic element:
Radioactive and toxic.

Mendelevium is a chemical element, having the chemical symbol Md and its atomic number (the number of protons) is 101. It has a standard atomic weight of 258 g•mol −1 and it is a solid in its elemental form.

Mendelevium is considered a member of the "Transuranic" class of elements. At a pressure of 101.325 kPa, it has a melting point of 827 °C. There is no data available regarding its boiling point.

It was named after Dmitri Ivanovich Mendeleev, who is recognized as the father of the Periodic table of elements.[1]