Tabla

Electronic ConfigurationKr 5s1 4d4

Melting Point2468°C

Boiling Point4742°C

Density8.57g cm⁻³

Description

Soft, ductile grey-blue metallic transition element. Used in special steels and in welded joints to increase strength. Combines with halogens and oxidizes in air at 200 degrees celsius. Discovered by Charles Hatchett in 1801 and isolated by Blomstrand in 1864. Called Columbium originally.

Covalent Radius147pm

Double125pm

Triple116pm

Ionisation Energies

Oxidation States0, +3, +5

Uses

Used as an alloy with Iron and Nickel. It can be used in nuclear reactors and is known to be superconductive when alloyed with Tin, Aluminum or Zirconium.

Electron Affinity88.516kJ mol⁻¹

Electronegativity1.6PAULING

Atomic Volume10.8cm³ mol⁻¹

Atomic Radius146pm

Metallic Radius134pm

Van Der Waals Radius218pm

Sources

Occurs in a mineral columbite. Formerly known as colombium (Cb). It is used in stainless steel alloys for nuclear reactors, jets and missiles.

Discovery

Discovered in 1801 by Charles Hatchet in England

Name Origin

From Niobe; daughter of the mythical Greek king Tantalus.

CAS7440-03-1

Crust Abundance20mg kg⁻¹

Sea Abundance1.00x10⁻⁵mg dm⁻³

Enthalpy of Vapourisation 680kJ mol⁻¹

Enthalpy of Fusion26.8kJ mol⁻¹

Enthalpy of Formation733kJ mol⁻¹

Specific Heat - 20°C0.268J (g ⋅ K)⁻¹

Thermal Conductivity53.7W (m ⋅ K)⁻¹

Isotope	Abundance	Half Life
93Nb	100%	-

https://reuben.science

https://github.com/reubn/tabla

Using data from mendeleev.

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