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Technical data for Dubnium

Click any property name to see plots of that property for all the elements.

Overview
NameDubnium
SymbolDb
Atomic Number105
Atomic Weight270[note]
DensityN/A
Melting PointN/A
Boiling PointN/A

Thermal properties
PhaseN/A
Melting PointN/A
Boiling PointN/A
Absolute Melting PointN/A
Absolute Boiling PointN/A
Critical PressureN/A
Critical TemperatureN/A
Heat of FusionN/A
Heat of VaporizationN/A
Specific HeatN/A
Adiabatic IndexN/A
Neel PointN/A
Thermal ConductivityN/A
Thermal ExpansionN/A

Bulk physical properties
DensityN/A
Density (Liquid)N/A
Molar VolumeN/A
Brinell HardnessN/A
Mohs HardnessN/A
Vickers HardnessN/A
Bulk ModulusN/A
Shear ModulusN/A
Young ModulusN/A
Poisson RatioN/A
Refractive IndexN/A
Speed of SoundN/A
Thermal ConductivityN/A
Thermal ExpansionN/A

Reactivity
Valence5
ElectronegativityN/A
ElectronAffinityN/A
Ionization EnergiesN/A

Health and Safety
DOT Hazard ClassN/A
DOT NumbersN/A
RTECS NumberN/A
NFPA LabelN/A

Classifications
Alternate NamesNone
Names of AllotropesNone
Blockd
Group5
Period7
SeriesTransition Metal
Electron Configuration[Rn]7s25f146d3[note]
ColorN/A
Discovery
1967 in Russia and The United States
Gas phaseN/A
CAS NumberCAS53850-35-4
CID NumberN/A
RTECS NumberN/A

Electrical properties
Electrical TypeN/A
Electrical ConductivityN/A
ResistivityN/A
Superconducting PointN/A

Magnetic properties
Magnetic TypeN/A
Curie PointN/A
Mass Magnetic SusceptibilityN/A
Molar Magnetic SusceptibilityN/A
Volume Magnetic SusceptibilityN/A

Abundances
% in UniverseN/A
% in Sun0%
% in Meteorites0%
% in Earth's Crust0%
% in Oceans0%
% in Humans0%

Atomic dimensions and structure
Atomic RadiusN/A
Covalent RadiusN/A
Van der Waals RadiusN/A
Crystal StructureN/A
Lattice AnglesN/A
Lattice ConstantsN/A
Space Group NameN/A
Space Group NumberN/A

Nuclear Properties
Half-Life5.555555555556 h
Lifetime8.333333333333 h
Decay ModeAlphaEmission
Quantum Numbers4F3/2[note]
Neutron Cross SectionN/A
Neutron Mass AbsorptionN/A
Known Isotopes
255Db, 256Db, 257Db, 258Db, 259Db, 260Db, 261Db, 262Db, 263Db, 264Db, 265Db, 266Db, 267Db, 268Db, 269Db, 270Db
Stable Isotopes
None
Isotopic Abundances


Notes on the properties of Dubnium:

Atomic Mass: Atomic mass number given for longest lived isotope.

Electron Configuration: Value is a guess based on periodic table trend.

Quantum Numbers: Value is a guess based on periodic table trend.

Up to date, curated data provided by Mathematica's ElementData function from Wolfram Research, Inc.

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