102

No NOBELIO-NOBELIUM

MASS: (259) 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f14

MELTING POINT: 1100 K

BOILING POINT: NO DISCOVERED

DENSITY: NO DISCOVERED

DISCOVERY: 1958 (Albert Ghiorso, T. Sikkeland, J.R. Walton, y Glenn T.)

Nobelium is a synthetic element with the symbol No and atomic number 102. 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. Further work in 1961 on the attempted synthesis of element 103, produced evidence for a Z=102 alpha activity.