Nobelium

Nobelium is a synthetic element with the symbol No and atomic number 102. It was first correctly identified in 1966 by scientists at the Flerov Laboratory of Nuclear Reactions in Dubna, Soviet Union. Little is known about the element but limited chemical experiments have shown that it forms a stable divalent ion in solution as well as the predicted trivalent ion that is associated with its presence as one of the actinides.
Symbol: No
Electron configuration: Rn 5f14 7s2
Melting point: 826.8 °C
Atomic number: 102
Discovered: 1958
Atomic mass: 259 u