Dubnium

Transition metal · 268.126 u · group 5, period 7

Dubnium · Db

Atomic number105

SymbolDb

CategoryTransition metal

Standard stateSolid

Group · Period · Block5 · 7 · d

Electron configuration[Rn]7s2 5f14 6d3

Atomic mass268.126 u

Atomic radius—

Protons / Neutrons / Electrons105 / 163 / 105

Shells (e⁻ per shell)2, 8, 18, 32, 32, 11, 2

Electronegativity (Pauling)—

Ionization energy—

Electron affinity—

Oxidation states5, 4, 3

Melting point—

Boiling point—

Density—

Year discovered1967

CPK color

#D1004F

State at room temp (25 °C)

unknown

Position