No
Nobelium
Element 102 · Actinide
Nobelium (No)
Nobelium is a synthetic radioactive element. Its discovery was disputed between Swedish, American and Soviet teams.
- Actinide
- Period 7
- f-block series
- f-block
- solid at room temperature
- ☢ Radioactive
Key properties
- Atomic mass
- [259]
- u
- Electron configuration
- [Rn] 5f14 7s2
- Melting point
- 826.9 °C
- 1,100 K
- Boiling point
- —
- Density
- —
- Electronegativity
- 1.3
- Pauling
- Atomic radius
- —
- 1st ionisation energy
- 6.65 eV
Compare with every element:Electronegativity chartAtomic radius chartIonisation energy chartDensity chart of the elementsMelting point chartElectron configuration chart
Did you know?
Notable facts about nobelium
- 01
A 1957 claim from the Nobel Institute in Stockholm could not be reproduced, but the name stuck.
- 02
IUPAC credited the Dubna team in Russia with the discovery.
- 03
Its longest-lived isotope has a half-life of under an hour.
Applications
What is nobelium used for?
- Research
History
Discovery & name origin
Discovered by
Year
Where
Russia
Name origin
From Alfred Nobel, founder of the Nobel Prizes.
Atomic structure
Atomic properties
Atomic structure
Atomic properties
- Atomic number
- 102
- Atomic mass
- [259] u
- Group
- Actinides (3)
- Period
- 7
- Block
- f-block
- Electron configuration
- [Rn] 5f14 7s2
- Full configuration
- 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f14
- Electrons per shell
- 2, 8, 18, 32, 32, 8, 2
- Electronegativity (Pauling)
- 1.3
- Electron affinity
- —
- Atomic radius (van der Waals)
- —
- Stable isotopes
- None — all isotopes are radioactive
Oxidation states
Highlighted: common oxidation states (+3, +2).
Physical
Physical properties & colour
Physical
Physical properties & colour
- State at 20 °C
- Solid
- Melting point
- 1,100 K · 826.9 °C · 1,520.3 °F
- Boiling point
- —
- Density
- —
- Molar heat capacity
- —
- Appearance
- —
- CPK model colour
- Copied
The CPK colour is the convention used for this element’s atoms in molecular models.
FAQ
Nobelium questions
What is No on the periodic table?
No is the symbol for nobelium, element 102 on the periodic table. It sits in period 7, in the f-block, in the actinide category, and has an atomic mass of [259].
What is the atomic number of nobelium?
Nobelium has atomic number 102, so every nobelium atom has 102 protons in its nucleus. Its symbol is No and its atomic mass is [259].
Who discovered nobelium?
Nobelium was discovered by Georgy Flerov in 1966 (Russia). The name comes from from Alfred Nobel, founder of the Nobel Prizes.
What is nobelium used for?
Nobelium is used for: research.
Is nobelium a metal?
Yes. Nobelium is a actinide, one of the metallic elements.
What is the electron configuration of nobelium?
The electron configuration of nobelium is [Rn] 5f14 7s2. Its 102 electrons are arranged in shells as 2, 8, 18, 32, 32, 8, 2.