- 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
Atomic Mass (u)
3453.15
Melting Point (K)
5869
Boiling Point (K)
21.02
Density (solid: g/cm³, gas: g/liter)
2
Atomic Radius (Å)
1.51
Covalent Radius (Å)
1.9
Electronegativity
7.83
First Ionization Energy (eV)
5.83
Electron Affinity
6
Number of Shells
2, 8, 18, 32, 13, 2
Electron Shell Occupations
0.14
Specific Heat (J/g)