Periodic table

 

 

Atomic number:75

Group numbers:7

Period:6

Electronic configuration:[Xe] 4f¹⁴ 5d⁵ 6s²

Formal oxidation number:+4 +6 +7

Electronegativities:1.9

Atomic radius / pm:137.1

Relative atomic mass:186.207 ± 0.001

 

Rhenium was discovered by Walter Noddack, Ida Tacke-Noddack and Otto Berg (DE) in 1925. The origin of the name comes from the Latin word Rhenus meaning river Rhine. It is a rare and costly, dense, silvery-white metal that tarnishes in moist air, resists corrosion and oxidation .Rhenium dissolves in nitric and sulfuric acids but has a very high melting point. Rhenium is found in small amounts in gadolinite and molybdenite. It is mixed with tungsten or platinum to make filaments for mass spectrographs. Its main value is as a trace alloying agent for hardening metal components that are subjected to continuous frictional forces.

PHYSICAL PROPERTIES

Density / g dm^-3:21020 (293 K)

 18900 (m.p.)

Molar volume / cm³mol^-1:8.86 (293 K)

 9.85 (m.p.)

Electrical resistivity / μΩcm:19.3 (20 °C)

THERMAL PROPERTIES

Thermal conductivity / W m^-1K^-1:47.9

Melting point / °C:3186

Boiling point / °C:5596

Heat of fusion / kJ mol^-1:33.1

Heat of vaporization / kJ mol^-1:704.25

Heat of atomization / kJ mol^-1:769

IONIZATION ENERGIES

First ionization energy / kJ mol^-1:755.82

Second ionization energy / kJ mol^-1:-

Third ionization energy / kJ mol^-1:-

ABUNDANCE OF ELEMENTS

in the atmosphere / ppm:-

in the Earth's crust / ppm:0.0005

in the oceans / ppm:1E-10

CRYSTALLOGRAPHIC DATA

ISOTOPES

REDUCTION POTENTIALS

 

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Citing this page:

Generalic, Eni. "Rhenium." EniG. Periodic Table of the Elements. 3 Jan. 2012. KTF-Split. {Date of access}. <http://www.periodni.com/re.html>.