columbium, élément chimique (cb)

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{n} columbium

Symbol Cb or Nb

A rare element of the vanadium group, first found in a variety of the mineral columbite occurring in Connecticut, probably at Haddam

a former name for niobium

The former name of niobium

Now more commonly called niobium

{i} metallic element (Chemistry)

Atomic weight 94

Heceleme

columbium, el·e·ment chimique (cb)