No
259.000Nobelium
Nobelyum
Nobelium is a synthetic radioactive actinide with atomic number 102. It is known for nobelium-259, stable No²⁺ chemistry, a full 5f¹⁴ shell and the complicated history of transfermium element discovery.
102
259 g/mol
[Rn] 5f¹⁴ 7s²
2 | 8 | 18 | 32 | 32 | 8 | 2
1.3
—
826.9 °C
—
JINR Dubna (Flerov et al.)
Nobelium discovery was disputed among groups in Stockholm, Berkeley and Dubna. The name honors Alfred Nobel and was retained after the long transfermium naming debates.
Nobelium-255
Half-life: About 3.1 minutes. Short-lived isotope used in nuclear studies.Nobelium-259
Half-life: About 58 minutes. Longest-lived nobelium isotope.- Basic research on late-actinide chemistry
- Studies of No²⁺ stability and the effect of a full 5f shell
- Nuclear structure and decay-chain research
Nobelium has no biological role. It is produced only in particle accelerators and all of its isotopes are radioactive.
- Nobelium is unusual among actinides because the +2 oxidation state is especially stable in aqueous chemistry.
- No²⁺ has a full 5f¹⁴ configuration, analogous to the stability of Yb²⁺ in the lanthanides.
- The nobelium naming story is part of the transfermium wars over element discovery priority.
- Nobelium has atomic number 102 and symbol No.
- Its electron configuration is [Rn] 5f¹⁴ 7s².
- Nobelium often favors +2 chemistry because No²⁺ has a full 5f¹⁴ shell.
- Remember No-259 for a roughly 58-minute half-life.
What is the atomic number of nobelium?
The atomic number of nobelium is 102.
What is the electron configuration of nobelium?
Nobelium has the electron configuration [Rn] 5f¹⁴ 7s².
What is nobelium used for?
Nobelium has no commercial use; it is used only in nuclear and actinide chemistry research.
What is nobelium-259?
Nobelium-259 is the longest-lived nobelium isotope, with a half-life of about 58 minutes.
Why is nobelium chemistry unusual?
Nobelium can favor the +2 oxidation state because No²⁺ has a stable full 5f¹⁴ electron shell.