Nobelium (No)
Nobelium (No, element 102) is an actinide in period 7. Atomic mass 259, electron configuration [Rn] 5f¹⁴ 7s², uses and facts.
About Nobelium
Nobelium is an actinide with the symbol No and atomic number 102. It is a solid at room temperature, and it sits in period 7 of the periodic table. Nobelium was discovered in 1958 by Albert Ghiorso.
Nobelium key facts
- Atomic number: 102
- Symbol: No
- Atomic mass: 259 u
- Category: actinide
- Group: none (f-block)
- Period: 7
- State at room temperature: solid
- Electron configuration: [Rn] 5f¹⁴ 7s²
- Electronegativity (Pauling): 1.3
- Melting point: 1100 K (826.85 °C)
- Boiling point: not known
- Density: not known
- Common oxidation states: +2, +3
Electron configuration
The electron configuration of nobelium is [Rn] 5f¹⁴ 7s². The part in brackets is the noble gas core; the rest shows how the outer electrons fill their subshells.
Uses of nobelium
- Research only
Did you know?
Named after Alfred Nobel. Its discovery was controversial, Swedish, American and Soviet teams all claimed credit.
Neighbouring elements
- Mendelevium (Md)
- Lawrencium (Lr)
- Actinium (Ac)
- Thorium (Th)
- Protactinium (Pa)
- Uranium (U)
- Neptunium (Np)
- Plutonium (Pu)
- Americium (Am)
- Curium (Cm)
Frequently asked questions
What is the atomic number of nobelium?
The atomic number of nobelium is 102, which means every nobelium atom has 102 protons.
What is the electron configuration of nobelium?
The electron configuration of nobelium is [Rn] 5f¹⁴ 7s².
What group and period is nobelium in?
Nobelium is an actinide in period 7.
What state is nobelium at room temperature?
Nobelium is a solid at room temperature.
What is nobelium used for?
Nobelium is used for research only.