Element Dubnium (Db)

Atomic number 105 · transition metal · Atomic mass 268 u

Atomic Mass
268.0000 u
Element Properties
Atomic Number 105
Atomic Mass 268.0000 u
Category transition metal / 过渡金属
Group 5
Period 7
Block D
Electron Configuration [Rn] 5f¹⁴ 6d³ 7s²
Electronegativity (Pauling)
Phase at STP Solid
Density 29.3 g/cm³
Year Discovered 1967

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