Niobium

Niobium is a transition metal that has a atomic number of 41 and chemical symbol Nb. It has one stable isotope, with mass number 93. Its color is silvery-grey.

In the United States, niobium is often called columbium in metallurgy.

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Elements

Alkali metals	Hydrogen \| Lithium \| Sodium \| Potassium \| Rubidium \| Caesium \| Francium \| Ununennium \| Unsepttrium
Alkaline earth metals	Beryllium \| Magnesium \| Calcium \| Strontium \| Barium \| Radium \| Unbinilium \| Unseptquadium
Transition metals	Scandium \| Yttrium \| Titanium \| Vanadium \| Chromium \| Manganese \| Iron \| Cobalt \| Nickel \| Copper \| Zinc \| Zirconium \| Niobium \| Molybdenum \| Technetium \| Ruthenium \| Rhodium \| Palladium \| Silver \| Cadmium \| Hafnium \| Tantalum \| Tungsten \| Rhenium \| Osmium \| Iridium \| Platinum \| Gold \| Mercury \| Rutherfordium \| Dubnium \| Seaborgium \| Bohrium \| Hassium \| Meitnerium \| Darmstadtium \| Roentgenium \| Copernicium
Lanthanides	Lanthanum \| Cerium \| Praseodymium \| Neodymium \| Promethium \| Samarium \| Europium \| Gadolinium \| Terbium \| Dysprosium \| Holmium \| Erbium \| Thulium \| Ytterbium
Actinides	Actinium \| Thorium \| Protactinium \| Uranium \| Neptunium \| Plutonium \| Americium \| Curium \| Berkelium \| Californium \| Einsteinium \| Fermium \| Mendelevium \| Nobelium
Other metals	Aluminum \| Gallium \| Indium \| Tin \| Thallium \| Lead \| Bismuth \| Nihonium \| Flerovium \| Moscovium \| Livermorium
Metalloids	Boron \| Silicon \| Germanium \| Arsenic \| Antimony \| Tellurium \| Polonium
Other nonmetals	Carbon \| Nitrogen \| Oxygen \| Phosphorus \| Sulfur \| Selenium
Halogens	Chlorine \| Fluorine \| Bromine \| Iodine \| Astatine \| Tennessine?
Noble gases	Helium \| Neon \| Krypton \| Xenon \| Radon \| Oganesson \| Unseptbium