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| General
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| Name, Symbol, Number
| Niobium, Nb, 41
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| Chemical series
| Transition metals
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| Group, Period, Block
| 5, 5 , dThe d-block of the periodic table of elements consists of those periodic table groups that contain elements in which, in the atomic ground state, the highest-energy electron is in a d- orbital. The d-block elements are often also known as transition metal
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| DensityFor other meanings of density, see density (disambiguation Density (symbol: rho Greek: rho) is a measure of mass per unit of volume. The higher an object's density, the higher its mass per volume. The average density of an object equals its total mass div, Hardness
| 8570 kg/m3Kilogram per cubic metre is the SI measure of density and is represented as kg/m³, where kg stands for kilogram and m³ stands for cubic metre. The density of water is about 1000 kg/m³, since a cubic metre of water weighs about a tonne. kg/m³" is sometimes, 6
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| AppearanceFor alternative meanings, see color (disambiguation). visual arts. Color (or colour is a sensation which (in humans) derives from the ability of the fine structure of the eye to distinguish three differently filtered analyses of a view. The perception of
| grey metallic
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| Atomic properties
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| Atomic weightIn reference to a certain isotope of a chemical element, atomic weight (more accurately relative atomic mass though also called simply atomic mass is the mass of one atom of the isotope expressed in units atomic mass unit amu) such that the Carbon-12 isot
| 92.90638 amuTo help compare different orders of magnitude we list here masses between 60. 22 amu and 602. 2 amu (10-25 kg and 10-24 kg). See also masses of other orders of magnitude. lighter masses 91. 224 amu atomic mass of zirconium 92. 90638 amu atomic mass of nio
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| Atomic radiusAtomic radius is the distance from the atomic nucleus to the outmost stable electron orbital in a atom that is at equilibrium and is measured in picometers or Angstroms. Atomic radii are called covalent radii (a reference to the types of bonds formed) whe (calc.)
| 145 (198) pm
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| Covalent radius
| 137 pm
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| van der Waals radius
| no data
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| Electron configuration
| [ Kr]4d4 5 s1
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| e- 's per energy level
| 2, 8, 18, 12, 1
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| Oxidation states ( Oxide)
| 5, 3 (mildly acidic)
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| Crystal structure
| Cubic body centered
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| Physical properties
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| State of matter
| solid ( __)
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| Melting point
| 2750 K (4491 ° F)
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| Boiling point
| 5017 K (8571 °F)
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| Molar volume
| 10.83 ×10-6 m3/mol
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| Heat of vaporization
| 696.6 kJ/mol
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| Heat of fusion
| 26.4 kJ/mol
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| Vapor pressure
| 0.0755 Pa at 2741 K
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| Speed of sound
| 3480 m/s at 293.15 K
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| Miscellaneous
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| Electronegativity
| 1.6 ( Pauling scale)
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| Specific heat capacity
| 265 J/(kg*K)
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| Electrical conductivity
| 6.93 106/(m· ohm)
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| Thermal conductivity
| 53.7 W/(m*K)
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| 1st ionization potential
| 652.1 kJ/mol
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| 2nd ionization potential
| 1380 kJ/mol
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| 3rd ionization potential
| 2416 kJ/mol
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| 4th ionization potential
| 3700 kJ/mol
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| 5th ionization potential
| 4877 kJ/mol
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| 6th ionization potential
| 9847 kJ/mol
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| 7th ionization potential
| 12100 kJ/mol
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| Most stable isotopes
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| SI units & STP are used except where noted.
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