1. columbium

noun. a former name for niobium.


  • atomic number 41
  • Nb

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Sentences with columbium

1. Noun, singular or mass
In 1864, Christian Wilhelm Blomstrand managed to isolate the element in Niobic acid, and thus the metallic form of Niobium was finally proof of the element Niobium, the name used for the element once called columbium.