Basic Information

Name: Rhenium 
Symbol: Re 
Atomic Number: 75 
Atomic Mass: 186.207 amu 
Melting Point: 3180.0 °C (3453.15 K, 5756.0 °F) 
Boiling Point: 5627.0 °C (5900.15 K, 10160.6 °F) 
Number of Protons/Electrons: 75 
Number of Neutrons: 111 
Classification: Transition Metal 
Crystal Structure: Hexagonal 
Density @ 293 K: 21.02 g/cm3 
Color: silverish
Date of Discovery: 1925 
Discoverer: Walter Noddack 
Name Origin: From Rhines provinces of Germany 
Uses: filaments for mass spectrographs 
Obtained From: gadolinite, molybdenite