he found it in a rock sent from North America
Charles Hatchett.
cellphone
Niobium was discovered in 1801 by Charles Hatchett, a British chemist, who identified it as a new element in a mineral sample sent to him.
Niobium was discovered in 1801 by Charles Hatchett, an English chemist. It was originally called columbium because it was found in a mineral sample from Massachusetts, Columbia being a poetical name for America.
Niobium was discovered in 1801 by English chemist Charles Hatchett in the United Kingdom.
The element niobium was discovered by Charles Hatchett in the year 1801. He discovered the element by analyzing a piece of columbite in a museum's collection.
Niobium was discovered in the year 1801 by an English Scientist by the name Charles Hatchett. It costs about $25-30 per pound.
Charles Hatchett died on 1847-03-10.
Charles Hatchett was born on 1765-01-02.
Charles Hatchett has written: 'An Analysis of a Mineral Substance from North America, Containing a Metal Hitherto Unknown' -- subject(s): Accessible book 'The Hatchett diary' -- subject(s): Manufactures, Mineral industries
To determine the number of moles in 237g of niobium, we need to use the molar mass of niobium, which is approximately 92.91 g/mol. By dividing 237g by the molar mass of niobium, we find that there are approximately 2.55 moles of niobium in 237g.
Niobium, formerly columbium, is a chemical element with the symbol Nb and atomic number 41. It is a soft, grey, ductile transition metal, which is often found in the pyrochlore mineral, the main commercial source for niobium, and columbite. Wikipedia Symbol: Nb Electron configuration: Kr 4d4 Atomic number: 41 Melting point: 2,469 °C Atomic mass: 92.90638 ± 0.00002 u Discoverer: Charles Hatchett Source: Google