105Db

Dubnium

Transition Metal

Dubnium (Db) is element 105, a transition metal, in period 7 and group 5 of the periodic table. Its atomic mass is usually given as 268. Discovered by Joint Institute, 1967.

Atomic Number105

SymbolDb

NameDubnium

Atomic Weight268 u

CategoryTransition Metal

Period7

Group5

Electron Config[Rn] 5f14 6d3 7s2

Discovered ByJoint Institute, 1967

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