102NoNobelium259[Rn] 5f¹⁴ 7s²
actinide
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.
A stylized shell model. Electrons are quantum objects, not particles following these literal paths. Sizes and motion are illustrative.
Electrons by shell
Electron configuration
5f14
7s2
86 is the [Rn] core total across six shells.
At a glance
- Atomic number
- 102
- Atomic mass
- 259 u
- Phase
- Solid
- Density
- Unavailable
- Melting point
- 1,100 K
- Boiling point
- Unavailable
- First ionization energy
- 642 kJ/mol
- Electronegativity
- 1.3
- Electron affinity
- -223.22 kJ/mol
- Molar heat capacity
- Unavailable
- Period
- 7
- Appearance
- Unavailable
Conditions and isotopes affect measured properties. Some properties of short-lived elements are predicted. Electronegativity uses the Pauling scale.
Keep exploring
Explore the stories, imagery, and reference data in more depth. Properties with no value in the reference are marked unavailable.