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102No259.000
Nobelium
ActinideNobelium is a synthetic chemical element with symbol No and atomic number 102. It is named in honor of Alfred Nobel, the inventor of dynamite and benefactor of science. A radioactive metal, it is the tenth transuranic element and is the penultimate member of the actinide series.
Phase: Solid
2, 8, 18, 32, 32, 8, 2
Physical Properties
Atomic Mass259 u
Melting Point1100 K
Period7
PhaseSolid
Chemical Properties
Electron Configuration1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f14
Semantic Config[Rn] 5f14 7s2
Shells2, 8, 18, 32, 32, 8, 2
Electron Affinity-223.22 kJ/mol
Electronegativity1.3
Ionization Energies
IE1: 642 kJ/mol
Discovery
Discovered byJoint Institute for Nuclear Research