![[ATOM]](atom.gif) |
Rhenium
|
|
Information valid for Re-186 unless otherwise noted
Basic Information
Symbol: Re
Atomic Number: 75
Mass: 186.207
Melting Point: 3180.0 C
Boiling Point: 5627.0 C
Number of Protons/Electrons: 75
Number of Neutrons: 111
Classification: Transition Metal
Crystal Structure: Hexagonal
Density @ 293 K: 21.02 g/cm3
Color: silverish
Atomic Structure
![[Bohr Model of Rhenium]](b0075.gif) |
|
Number of Energy Levels: 6
First Energy Level: 2
Second Energy Level: 8
Third Energy Level: 18
Fourth Energy Level: 32
Fifth Energy Level: 13
Sixth Energy Level: 2
|
Isotopes
| Isotope |
Half Life |
| Re-182 |
2.67 days |
| Re-182m |
12.7 hours |
| Re-183 |
70.0 days |
| Re-184 |
38.0 days |
| Re-184m |
165.0 days |
| Re-185 |
Stable |
| Re-186 |
3.77 days |
| Re-187 |
4.1E10 years |
| Re-188 |
16.94 hours |
Facts
Date of Discovery: 1925
Discoverer: Walter Noddack
Name Origin: From Rhines provinces of Germany
Uses: filaments for mass spectrographs
Obtained From: gadolinite, molybdenite