Symbol Re
Atomic Number 75
Atomic Mass 186.23 g.mol -1
Discovered by Walter Noddack, Ida Tacke and Otto Berg in 1925

Chemical Properties of Rhenium

Group 7 Melting point 3185°C, 5765°F, 3458 K
Period 6 Boiling point 5590°C, 10094°F, 5863 K
Block d Density (g cm−3) 20.8
Atomic number 75 Relative atomic mass 186.207
State at 20°C Solid Key isotopes 187Re
Electron configuration [Xe]4f14 5d6s2 CAS number 7440-15-5
ChemSpider ID 22388 ChemSpider is a free chemical structure database

What is Rhenium?

  • Rhenium is an extremely rare element and is scattered widely in nature.
  • It is a heavy, silvery-white and a third-row transition metal in group 7 of the periodic table.
  • The element can be traced on the earth’s surface in parts per billion.
  • The element has no mineral characteristic and it has been detected in certain ores of platinum and molybdenite.

Uses of Rhenium

  • The element is mainly used as a petroleum reforming catalyst and also in turbine engine of high-temperature components as superalloys.
  • The element amplifies the high-temperature strength properties of some nickel-based superalloys.
  • Rhenium is added to molybdenum and tungsten to form alloys that are used for making filaments for lamps and ovens.
  • Rhenium is added to high-temperature superalloys which are used to make jet engine parts.

Properties of Rhenium

  • The element has a very high melting point next to Tungsten.
  • The element is formed using oxidizing smelter residues gained by molybdenite processing.
  • The atmospheric heat would be more than sufficient to form the metallic version of this element.

Facts About Rhenium

  • The element is an important part of photoflash in photography.
  • It is used in the hydrogenation of fine chemicals and also as an additive to molybdenum and tungsten based alloys.

Practise This Question

Which of the following processes involves rotting of the gummy skin of jute sticks in water?