Periodic Table of Elements: Niobium

Symbol: Nb Atomic number: 41 Discovered: 1801 Melting point: 4,491°F (2,477°C) Discoverer: Charles Hatchett Electron configuration: [Kr] 4d⁴5s¹ Atomic mass: 92.90638 u Niobium and columbium are synonymous names for the chemical element with atomic number 41; columbium was the name given in 1801, and niobium (Nb) was the name officially designated by the International Union of Pure and Applied Chemistry in 1950. Niobium was first discovered (1801) in an ore sample from Connecticut by the English chemist Charles Hatchett, who called the element columbium in honour of the country of its origin, Columbia being a synonym for the United States.

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