Atomic Properties of V
- Atomic Number of V
- 23
- Atomic Mass of V
- 50.9420 u
- Electron Configuration
- [Ar] 3d3 4s2
- Electronegativity
- 1.63
- Block
- d-block
- Group
- 5
- Period
- 4
Andrés Manuel del Río recognized element 23 in Mexican ore in 1801, then withdrew the claim after being incorrectly persuaded that his sample contained chromium. Nils Gabriel Sefström rediscovered it in 1830 and named vanadium for Vanadis, a Norse name associated with beauty. Henry Roscoe isolated the metal in 1867. The history turns “discovered twice” into a lesson about lost evidence and restored credit.
Vanadium changes colors so often in aqueous chemistry because different oxidation states and ligand environments absorb different wavelengths. Common demonstrations can move among yellow vanadium(V), blue vanadium(IV), green vanadium(III), and violet vanadium(II) solutions. The colors belong to particular ions under particular conditions, not to the silvery metal changing costumes spontaneously.
Small additions strengthen steel by forming hard carbides and refining grain structure. Vanadium steels serve in tools, springs, axles, and other components where strength, wear resistance, or toughness matters. Vanadium pentoxide catalyzes sulfuric-acid production, while vanadium redox-flow batteries store energy in liquid electrolytes containing different oxidation states.
Some vanadium compounds are biologically active, but claims of universal human essentiality remain unsettled. Dusts and compounds can also be hazardous, with risk depending strongly on species and exposure.
This Forger's craftsmanship lies in controlled variation. Charge state tunes solution color and battery chemistry; a small alloy fraction changes steel microstructure. The element is versatile because chemistry keeps specifying which vanadium is present.