Mendelevium is a transuranium element in the actinide series. It is denoted by the atomic symbol Md. It has an atomic number of 101 and an approximate atomic weight of 258. It is a man-made radioactive element which has no stable nuclides. The...

Mendelevium (pronounced /ˌmɛndəˈlɛviəm/), also known as unnilunium (/ˌjuːnɪlˈjuːniəm/, symbol Unu) is a synthetic element with the symbol Md (formerly Mv) and the atomic number 101. A metallic radioactive transuranic element of the...