102 - Nobelium actinide
Discovered by Joint Institute for Nuclear Research in 1958
- Atomic Radius (Å)
Nobelium 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.
Shell | Electrons | Orbitals |
---|---|---|
1 | 2 | 2 in 1s |
2 | 8 | 2 in 2s + 6 in 2p |
3 | 18 | 2 in 3s + 6 in 3p + 10 in 3d |
4 | 32 | 2 in 4s + 6 in 4p + 10 in 4d + 14 in 4f |
5 | 32 | 2 in 5s + 6 in 5p + 10 in 5d + 14 in 5f |
6 | 8 | 2 in 6s + 6 in 6p |
7 | 2 | 2 in 7s |
259 u
Atomic Mass
9.9 g/cm³
Density
-2.23e+2
Electron Affinity
1.3
Electronegativity
6.65 eV
First Ionization Energy
1100 K
Melting Point
7
Number of Shells
102
Atomic Number