Db
268.000Dubnium
Dubniyum
Dubnium is a synthetic transactinide element with atomic number 105. It is studied for Group 5 chemistry, dubnium fluoride complexes, tantalum-niobium comparisons, relativistic effects and transfermium naming history.
105
268 g/mol
[Rn] 5f¹⁴ 6d³ 7s²
2 | 8 | 18 | 32 | 32 | 11 | 2
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29.3 g/cm³
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Joint Institute for Nuclear Research
Dubnium was involved in discovery and naming disputes between Dubna and Berkeley. The official name honors Dubna, Russia, home of the Joint Institute for Nuclear Research.
Dubnium-268
Half-life: About 29-32 hours. Longest-lived known dubnium isotope in current nuclear data discussions.Dubnium-270
Half-life: About 1-2 hours. Short-lived isotope observed in superheavy decay chains.DbF₅
Dubnium(V) FluoridePredicted or studied Group 5 fluoride chemistry context.DbCl₅
Dubnium(V) ChlorideTransactinide halide chemistry comparison with Nb and Ta.- Transactinide aqueous chemistry comparing Db with niobium and tantalum
- Studies of Group 5 fluoride and chloride complex behavior
- Relativistic chemistry tests in superheavy elements
- Nuclear decay-chain research
Dubnium has no biological role. It is synthetic, radioactive and too short-lived for any practical biological interaction.
- Dubnium chemistry is especially useful for testing whether Group 5 trends continue below tantalum.
- Some dubnium chemistry results differ from simple niobium-tantalum extrapolation, making relativistic effects important.
- The element name preserves the role of Dubna in superheavy element research.
- Dubnium has atomic number 105 and symbol Db.
- Its listed electron configuration is [Rn] 5f¹⁴ 6d³ 7s²; superheavy element values are partly prediction-based.
- Dubnium is a Group 5 transactinide below tantalum.
- Remember Db for transfermium naming history and Group 5 chemistry tests.
What is the atomic number of dubnium?
The atomic number of dubnium is 105.
What is the electron configuration of dubnium?
Dubnium is commonly listed with [Rn] 5f¹⁴ 6d³ 7s², but superheavy-element values should be treated as partly prediction-based.
What is dubnium used for?
Dubnium is used only in transactinide chemistry and nuclear physics research.
What is dubnium-268?
Dubnium-268 is a relatively long-lived dubnium isotope with a half-life of about 29-32 hours in current nuclear data tables.
Why is dubnium named dubnium?
Dubnium is named after Dubna, the Russian city associated with the Joint Institute for Nuclear Research.