Bazsites.com Dubnium

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Visual Elements: Dubnium - Image, general and physical information, and key isotopes.
Dubnium - Historic information.
WebElements: Dubnium - Information on history, isolation, and properties.
EnvironmentalChemistry.com: Dubnium - Atomic structure, physical properties, and table of nuclides.
LANL: Dubnium - Basic information, history, and isotopes.
Lenntech: Dubnium - Physical data and chemical properties.
It's Elemental: Dubnium - Basic physical and historical information.
ChemicalElements.com: Dubnium - Diagram of its atomic structure, and basic information.
ChemGlobe: Dubnium - Electronic data along with an isotope table and basic facts.

Isotopes of dubnium - Dubnium (Db) has no stable isotopes. A standard atomic mass cannot be given.
Dubnium - Dubnium (IPA: ), also called eka-tantalum, is a chemical element in the periodic table that has the symbol Db and atomic number 105.
Group 5 element - A Group 5 element is one in the series of elements in group 5 (IUPAC style) in the periodic table, which consists of vanadium (V), niobium (Nb), tantalum (Ta), and dubnium (Db).