102No259.10100
Nobelium
Actinide
Solid at STP
Period 7Block FDiscovered 1957
[Rn]7s2 5f14
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.
📖 Read more on Wikipedia →Atomic Properties
| Atomic Number | 102 |
| Atomic Mass | 259.10100 u |
| Electron Configuration | [Rn]7s2 5f14 |
| Oxidation States | +3, +2 |
| Electronegativity | 1.3 (Pauling) |
| Ionization Energy | 6.65 eV |
| Block | F |
Physical Properties
| Standard State | Solid |
| Melting Point | 1100 K (826.9 °C) |
| CPK Color | #BD0D87 |
Classification
| Category | Actinide |
| Group Block | Actinide |
| Period | 7 |
| Block | F |
Discovery
| Year Discovered | 1957 |
| Discovered By | Joint Institute for Nuclear Research |
| Electron Shells | 2, 8, 18, 32, 32, 8, 2 |