Atomic / phase data
Reference atomic and phase values are source-reviewed.
Material structure
The ordinary elemental structure is measured; the viewer is a teaching representation.
Element vs material uses
Uses distinguish elemental metal from compounds, alloys, dopants or medical formulations.
Geography
Discovery/supply context is selective and does not fabricate deposits or facilities.
The lens describes evidence status, not confidence theatre. “Unknown” is kept unknown, and teaching schematics are not presented as direct measurements.
Niobium (Nb)
Niobium is element 41, a Group 5 transition metal whose BCC lattice, stable ⁹³Nb isotope and superconducting/alloy chemistry connect atomic structure to high-strength steels, accelerator magnets and MRI/NMR technology.
Niobium atomic number, mass, electron configuration and key properties
Niobium: quick answers
How many protons, neutrons and electrons does niobium have?
Niobium’s atomic number is 41, so every niobium atom has 41 protons, and a neutral atom also has 41 electrons. Its most common natural isotope, niobium-93, has 52 neutrons (other isotopes have different neutron counts).
What is the symbol for niobium?
The chemical symbol for niobium is Nb.
Is niobium a solid, liquid or gas at room temperature?
Niobium is a solid at room temperature (about 25 °C).
What family (group) is niobium in?
Niobium is a transition metal, in group 5, period 5 of the periodic table.
What is the electron configuration of niobium?
The ground-state electron configuration of niobium is [Kr] 4d⁴ 5s¹.
From atomic number to chemistry
Read these as a chain of causes, not as isolated facts. Each step links to the concept hub if you want the underlying idea explained.
41 protons define niobium.
The ground-state configuration frames atomic and chemical behavior.
Periodic position organizes recurring chemistry and trends.
The teaching nucleus is one isotope, not the relative atomic mass.
Phase claims preserve source-reviewed evidence and allotrope context.
Niobium in its period and family
Niobium lies in Group 5 between zirconium and molybdenum and above tantalum. Its anomalous [Kr]4d⁴5s¹ ground state and accessible +5 chemistry underpin refractory and superconducting materials.
Niobium Visual Lab
Explore Nb across the teaching nucleus, isolated-atom orbitals, evidence-aware material structure and temperature/evidence views, then connect those models to uses, isotopes, search-led questions and source-backed context.
Every mark points to one exact feature
The numbered markers explain the same information system used throughout Element Lookup. Unknown or predicted fields remain visibly labelled rather than being replaced with guesses.
Niobium in one minute
Atomic number 41 means 41 protons.
Neutral Niobium has [Kr] 4d⁴ 5s¹.
Its representative teaching isotope is ⁹³Nb.
Niobium used to be called columbium, which explains older technical terminology.
The ordinary material reference is body-centred cubic.
Shell rings organize electron counts. They are not electron trajectories or orbital shapes.
2 · 8 · 18 · 12 · 1 electrons
The 4d_z2, 4d_xy, 5s visuals are isolated-atom probability teaching models. They do not depict electron bands, bonding orbitals or the crystal electronic structure of Niobium materials.
Pure niobium is body-centred cubic under ordinary conditions. The viewer shows a conventional BCC teaching cell and stays separate from superconducting Nb-Ti and Nb₃Sn material structures.. The viewer is evidence-aware: measured structures are identified as such; unknown bulk structures stay unknown.
Teaching visualization; not a literal finite sample or thermal trajectory.What this model does—and does not—show
The 4d_z2, 4d_xy, 5s visuals are isolated-atom probability teaching models. They do not depict electron bands, bonding orbitals or the crystal electronic structure of Niobium materials.
Where do I meet niobium?
Clickable learning cards connect the element to materials, environment, technology, biology or research - depending on what the evidence actually supports.
High-strength steels
Small niobium additions can strengthen microalloyed structural and pipeline steels.
BCC metal → microalloying → superconductors
Niobium used to be called columbium, which explains older technical terminology. Modern chemistry uses niobium (Nb), and many high-profile applications rely on niobium alloys or compounds rather than pure metal alone.
BCC niobium
Ordinary Nb is a refractory BCC metal.
Niobium in periodic context
Compare nearby or family-related elements without treating a trend as a substitute for element-specific evidence.
| Group | 5 |
|---|---|
| Structure | BCC |
| Group | 5 |
|---|---|
| Structure | BCC |
| Group | 5 |
|---|---|
| Structure | BCC |
Niobium properties: atomic, physical, thermal and chemical
Categories follow the science of this element rather than a fixed decorative template. Each row carries condition/provenance context and an evidence label; unknown values stay unknown.
| Property | Value | Context / provenance | Evidence |
|---|---|---|---|
| Atomic number | 41 | Source-reviewed; see Sources below | Evaluated |
| Relative atomic mass | 92.906 | Source-reviewed; see Sources below | Evaluated |
| Ground-state electron configuration | [Kr] 4d⁴ 5s¹ | Source-reviewed; see Sources below | Evaluated |
| Group / period / block | Group 5 · Period 5 · d-block | Periodic-table placement | Evaluated |
| Electronegativity | 1.6 | Source-reviewed; see Sources below | Evaluated |
| Reference isotope | ⁹³Nb | Source-reviewed; see Sources below | Evaluated |
| Property | Value | Context / provenance | Evidence |
|---|---|---|---|
| State context | Silvery corrosion-resistant transition metal | Source-reviewed; see Sources below | Evaluated |
| Density | 8.57 g/cm³ | Source-reviewed; see Sources below | Evaluated |
| Material / molecular structure | Body-centred cubic | Pure niobium is body-centred cubic under ordinary conditions. The viewer shows a conventional BCC teaching cell and stays separate from superconducting Nb-Ti and Nb₃Sn material structures. | Measured |
| Classification | Transition metal | Periodic-table / chemistry classification | Evaluated |
| Structure-model scope | Pure niobium is body-centred cubic under ordinary conditions. The viewer shows a conventional BCC teaching cell and stays separate from superconducting Nb-Ti and Nb₃Sn material structures. | Teaching visualization; exact crystallographic coordinates are not implied unless stated. | Reviewed |
| Property | Value | Context / provenance | Evidence |
|---|---|---|---|
| Melting / transition reference | 2750 K | Source-reviewed; see Sources below | Evaluated |
| Boiling / gas reference | 5014 K | Source-reviewed; see Sources below | Evaluated |
| Phase-path context | At approximately standard pressure, niobium is BCC solid below 2750 K, liquid to about 5014 K, and gaseous above the boiling reference. | Shared phase registry drives the slider, regions and markers. | Evaluated |
| Condition warning | Temperature and pressure define phase behavior; purity/allotropy may matter. | Teaching condition statement | Reviewed |
| Property | Value | Context / provenance | Evidence |
|---|---|---|---|
| Ordinary electrical behavior | Metallic conductor | Qualitative bulk behavior; exact resistivity depends on temperature, purity and alloy state. | Measured |
| Conduction model | Collective solid-state electrons | Do not interpret isolated-atom orbital clouds as literal current paths. | Reviewed |
| Surface / compound caveat | Oxides, salts and alloys can behave differently from the pure metal | Material context | Reviewed |
| Engineering values | Condition-dependent | Use condition-specific materials data for engineering calculations. | Reviewed |
| Property | Value | Context / provenance | Evidence |
|---|---|---|---|
| Common oxidation states | +5, +3 | Source-reviewed; see Sources below | Evaluated |
| Ion / common ion context | Nb⁵⁺ | Source-reviewed; see Sources below | Evaluated |
| Periodic chemistry context | Niobium lies in Group 5 between zirconium and molybdenum and above tantalum. Its anomalous [Kr]4d⁴5s¹ ground state and accessible +5 chemistry underpin refractory and superconducting materials. | Element-specific interpretation | Reviewed |
| Chemistry caution | Elemental form, ions and compounds are distinct chemical objects. | Interpretive teaching rule | Reviewed |
| Property | Value | Context / provenance | Evidence |
|---|---|---|---|
| ⁹³Nb | Stable natural isotope | Essentially all naturally occurring niobium. | Evaluated |
| Radioisotopes | Artificial isotopes | Used mainly in nuclear and materials research. | Evaluated |
| Natural niobium | Single stable-isotope element | Relative atomic mass closely follows ⁹³Nb. | Evaluated |
| Teaching nucleus | ⁹³Nb · 41 protons + 52 neutrons | Reference isotope used in the nucleus model | Reviewed |
Is Niobium a solid, liquid or gas? State at temperature
At approximately standard pressure, niobium is BCC solid below 2750 K, liquid to about 5014 K, and gaseous above the boiling reference.
Where on Earth is Niobium found or produced?
Who discovered Niobium, and when?
Charles Hatchett identified a new element in columbite and called it columbium.
Heinrich Rose showed the element was distinct from tantalum and promoted the name niobium.
Christian Blomstrand produced metallic niobium by reducing a chloride.
IUPAC adopted niobium as the international name, though columbium persisted in some industries.
From source material to Niobium applications: high-level material path
Niobium-bearing minerals are concentrated and processed, commonly alongside tantalum-bearing material.
Refining separates niobium compounds and metal feedstocks.
Most niobium enters steel in small additions; high-purity routes feed superconducting alloys and specialty materials.
Scrap and alloy recycling can return niobium to material cycles.
What is niobium used for?
Microalloyed steel
Niobium improves strength and toughness in selected steels.
Superconductors
Nb-Ti and Nb₃Sn support MRI, NMR, accelerator and research magnets.
Superalloys
Niobium contributes to high-temperature alloy systems.
Optics & electronics
Niobium oxides and compounds are used in specialty glass and electronic materials.
Niobium isotopes and natural abundance
⁹³Nb
Stable natural isotopeEssentially all naturally occurring niobium.
Radioisotopes
Artificial isotopesUsed mainly in nuclear and materials research.
Natural niobium
Single stable-isotope elementRelative atomic mass closely follows ⁹³Nb.
Five-question Niobium check
What is Niobium’s atomic number?
Which classification best fits Niobium?
What is the representative teaching isotope?
Which statement respects the material evidence?
Which rule should guide real-world uses?
Niobium questions students commonly ask
Each answer starts with the direct fact, then explains the chemistry, evidence or material context so the result is understandable rather than merely memorized.
What is niobium?
Short answer: Niobium is chemical element 41, a Group 5 transition metal.
Atomic number 41 means every niobium nucleus contains 41 protons. In the periodic table, Niobium is classified here as a transition metal in Period 5 and Group 5. Niobium lies in Group 5 between zirconium and molybdenum and above tantalum. Its anomalous [Kr]4d⁴5s¹ ground state and accessible +5 chemistry underpin refractory and superconducting materials.
Key point: Nb is element 41; its periodic position and electron structure explain the rest of the page.
What is niobium used for?
Short answer: It is used in high-strength steels, superalloys and superconducting materials such as Nb-Ti and Nb₃Sn.
Microalloyed steel: Niobium improves strength and toughness in selected steels. Superconductors: Nb-Ti and Nb₃Sn support MRI, NMR, accelerator and research magnets. Niobium used to be called columbium, which explains older technical terminology. Modern chemistry uses niobium (Nb), and many high-profile applications rely on niobium alloys or compounds rather than pure metal alone.
Key point: Always distinguish the pure element from the compound, alloy, isotope or device material that actually performs the application.
Is niobium a metal?
Short answer: Yes. It is a silvery transition metal.
This guide classifies Niobium as a transition metal. Its periodic position is Period 5, d-block, Group 5. Niobium lies in Group 5 between zirconium and molybdenum and above tantalum. Its anomalous [Kr]4d⁴5s¹ ground state and accessible +5 chemistry underpin refractory and superconducting materials.
Key point: Periodic-table classification describes recurring atomic/chemical behavior; it does not make every element in a column physically identical.
Where is niobium found?
Short answer: It occurs in minerals including pyrochlore and columbite, commonly associated with tantalum.
Niobium-bearing minerals are concentrated and processed, commonly alongside tantalum-bearing material. The Geography Explorer keeps natural occurrence separate from resources, industrial production and recycling, because those datasets answer different questions about niobium.
Key point: Natural occurrence, resources, production and recycling are different geography questions.
Who discovered niobium?
Short answer: Charles Hatchett identified it in 1801, initially naming it columbium.
In 1801, Charles Hatchett identified a new element in columbite and called it columbium. In 1844, Heinrich Rose showed the element was distinct from tantalum and promoted the name niobium.
Key point: Discovery credit follows the historical evidence and accepted attribution, not just the earliest claim.
Is columbium the same element as niobium?
Short answer: Yes. Columbium is the historical name for element 41.
Niobium used to be called columbium, which explains older technical terminology. Niobium used to be called columbium, which explains older technical terminology. Modern chemistry uses niobium (Nb), and many high-profile applications rely on niobium alloys or compounds rather than pure metal alone.
Key point: Use the direct answer together with the material, isotope and evidence context shown elsewhere on the page.
What is niobium’s symbol?
Short answer: Nb.
The symbol Nb is the standardized chemical abbreviation for element 41. In a chemical formula, Nb identifies niobium atoms; a compound containing Nb is not automatically the same material as elemental niobium.
Key point: Nb always identifies element 41.
Scientific sources for Niobium
- Royal Society of Chemistry - Niobium
- NIST - Atomic Weights and Isotopic Compositions
- USGS - Mineral Commodity Summaries 2026
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