Dubnium

Metal

synthetic

Symbol: Db
Atomic number: 105
Atomic mass: (262.1144)
Group: Transition Metal
CAS-number: 53850-35-4

Navigation
Ta

Rf				Sg

Go to element

Electronic data

Shells: 2, 8, 18, 32, 32, 11, 2
Orbitals: [Rn] 5f¹⁴ 6d³ 7s²
Electronegativity: --, --
1. Ionization potential: -- eV
2. Ionization potential: -- eV
3. Ionization potential: -- eV
Oxidation states: --
Electrical conductivity: --

Thermal data

Melting point: -- °C
Boiling point: -- °C
Specific heat: -- J/gK
Heat of fusion: -- kJ/mol
Heat of vaporization: -- kJ/mol
Thermal conductivity: 0.58 W/cmK

Steric data

Atomic radius: -- Å
Ionic radius: -- Å
Covalent radius: -- Å
Atomic volume: -- cm³/mol
Density (293 K): -- g/cm³
Crystal structure: --

Nuclide	Abundance [%]	Mass	Spin	Halflife	Decay mode	Decay tree
²⁵⁸Db	0	258.109	0	4.2s	α, EC	View
²⁶²Db	0	262.114	0	34s	SF, α	View

Name origin:	--
Description:	Synthetic radioactive metal.
Discovered by:	A. Ghiorso, et al
Year:	1970
Place:	United States
Sources:	Made by bombarding californium-249 with a beam of nitrogen-15
Use(s):	It has no significant commercial applications.

Dubnium

Physical data

Electronic data

Thermal data

Steric data

Isotopes

Other info