General

Rhenium (Re) properties


Atomic mass, symbol and atomic number

rhenium is a naturally occurring element with the element symbol Re and the atomic number 75. In the periodic table it stands with an atomic mass of 186,207 u in the 7th subgroup. The chemical element discovered by Berg, Noddack and Tacke in 1925 is not radioactive and is in a solid state of aggregation at room temperature.

Profile: Rhenium (English rhenium)

General
Chemical element:rhenium
Symbol:re
Atomic number:75
Group:Manga group
Period:6
Block:d-block
Series:Transition metals
Appearance:silver
explorers:O. Berg, W. Noddack and I. Tacke
Year of discovery:1925
Atomic properties
Atomic mass:186,207 u
Atomic radius:135 pm
Covalent radius:159 pm
Van der Waals radius:unknown
Electron configuration:Xe 4f14 5d5 6s2
ionization:760 kJ / mol
Physical Properties
Physical state:firmly
Density:???
Crystal structure:hexagonal
Magnetism:paramagnetic
molar volume:8,86 · 10-6 m3/ mol
Mohs hardness:???
Melting point:3186 ° C
Boiling point:5630 ° C
Heat of fusion:33 kJ / mol
Heat of vaporization:707 kJ / mol
Thermal conductivity:48W
Chemical properties
electronegativity:1,9

Did you know that ...

  • Rhenium has the highest boiling point (5630 ° C) of all known chemical elements?
  • the element was named after the Rhine (river through Central Europe)?
  • Rhenium in powder form is highly flammable?