- Atomic Radius (Å)
Rhenium is a chemical element with symbol Re and atomic number 75. It is a silvery-white, heavy, third-row transition metal in group 7 of the periodic table. With an estimated average concentration of 1 part per billion (ppb), rhenium is one of the rarest elements in the Earth's crust.
75
Atomic Number
186.21 u
Atomic Mass
3453.15 K
Melting Point
5869 K
Boiling Point
21.02 g/cm³
Density
2 Å
Atomic Radius
1.51 Å
Covalent Radius
1.9
Electronegativity
7.83 eV
First Ionization Energy
5.83
Electron Affinity
6
Number of Shells
2, 8, 18, 32, 13, 2
Electron Shell Occupations
0.14 J/g
Specific Heat