102 No 259
Nobelium
actinide
Properties
- Atomic number
- 102
- Atomic mass
- 259 u
- Category
- actinide
- Group
- f-block
- Period
- 7
- Block
- f-block
- State (room temp)
- Solid
- Outer-shell electrons
- 2
- Electronegativity
- 1.3 (Pauling)
- Density
- —
- Melting point
- 826.85 °C
- Boiling point
- —
Electron configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s² 5f¹⁴
Noble-gas shorthand: [Rn] 5f¹⁴ 7s²
Electrons per shell: 2, 8, 18, 32, 32, 8, 2 — that's 2 in the outermost shell.
About Nobelium
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.
- Discovered by Joint Institute for Nuclear Research
Position in the periodic table
Data compiled from Wikipedia, PubChem, and IUPAC. Source.