Symbol
Re
Atomic Number
75
Atomic Mass
186.207
Protons
75
Neutrons
111
Electrons
75
Type
Transition Metal
Isotopes
Rhenium-185, Rhenium-187
Discovery Year
1925
Discovered By
Walter Noddack, Ida Noddack, Otto Berg
Group
7
Period
6
Boiling Point
5869°F
Melting Point
5900°F
Electron Configuration
[Xe] 6s² 4f¹⁴ 5d⁵
Density (g/cm³)
21.02
Crystal Structure
Hexagonal
Magnetism
Paramagnetic
Abundance in Earth's Crust
0.0007%
Phase at Room Temperature
Solid