Niobium,  ₄₁ Nb

Niobium
Pipe	/ n a? ? o? b i ? m / ​ ( ny- OH -bee-?m )
Ihansoju	gray metallic, yellowish when oxidized
Iwuwo at??mu A r, std (Nb)	92.906 3 7(1) [1]
Niobium ni ori tabili aye
Hydrogen Helium Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury (element) Thallium Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson V ↑ Nb ↓ Ta zirconium ← niobium → molybdenum
N??mba at??mu ( Z )	41
?gb??	group 5
Aye	aye 5
Adip??	Adip??-d
??ka ??lim??nti	Transition metal
Ito ??l??ktr??nu	[ Kr ] 4d 4 5s 1
Iye ??l??ktr??nu lori ipele k????kan	2, 8, 18, 12, 1
Aw?n ohun ini ara
Ifarahan at  STP	solid
Igba iy??	2750  K ​(2477 °C, ​4491 °F)
Igba iho	5017 K ​(4744 °C, ​8571 °F)
Kiki (near  r.t. )	8.57 g/cm 3
Heat of fusion	30  kJ/mol
Heat of	689.9 kJ/mol
Molar heat capacity	24.60 J/(mol·K)
pressure P   (Pa) 1 10 100 1 k 10 k 100 k at  T   (K) 2942 3207 3524 3910 4393 5013
Atomic properties
Oxidation states	?3, ?1, +1, +2, +3, +4, +5 Adak?:Infobox element/symbol-to-oxidation-state/comment
Electronegativity	Pauling scale: 1.6
Atomic radius	empirical: 146  pm
Covalent radius	164±6 pm
Spectral lines of niobium
Other properties
Natural occurrence	primordial
Crystal structure	​(bcc)
Speed of sound thin rod	3480 m/s (at 20 °C)
Thermal expansion	7.3 μm/(m·K)
Thermal conductivity	53.7 W/(m·K)
Electrical resistivity	152 n Ω·m (at 0 °C)
Magnetic ordering	paramagnetic
Young's modulus	105 GPa
Shear modulus	38 GPa
Bulk modulus	170 GPa
Poisson ratio	0.40
Mohs hardness	6.0
Vickers hardness	1320 MPa
Brinell hardness	736 MPa
CAS Number	7440-03-1
Main isotopes of niobium
Iso­tope Abun­dance Half-life ( t 1/2 ) Decay mode Pro­duct 91 Nb syn 6.8×10 2 y ε - 91 Zr 91 m Nb syn 60.86 d IT 0.104 e 91 Nb 92 Nb syn 10.15 d ε - 92 Zr γ 0.934 - 92 Nb syn 3.47×10 7 y ε - 92 Zr γ 0.561, 0.934 - 93 Nb 100% 93 Nb is stable with 52 neutrons 93 m Nb syn 16.13 y IT 0.031 e 93 Nb 94 Nb syn 2.03×10 4 y β ? 0.471 94 Mo γ 0.702, 0.871 - 95 Nb syn 34.991 d β ? 0.159 95 Mo γ 0.765 - 95 m Nb syn 3.61 d IT 0.235 95 Nb
Adak?:Category-inline wo ??r?? atun?e | references

Niobium (pipe /na??o?bi?m/ nye- OH -bee-?m ) ( Greek mythology : Niobe , omo birin Tantalus ), tabi columbium ( /k??l?mbi?m/ k?- LUM -bee-?m ), je ipilese elegbogi pelu ami-idamo Nb ati nomba atomu 41.

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