Rhenium (pronounced /ˈriːniəm/, REE-nee-əm) is a chemical element with the 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 average concentration of 1 part per billion (ppb), rhenium is one of the rarest elements in the Earth's crust. Rhenium resembles manganese chemically and is obtained as a by-product of molybdenum and copper refinement. Rhenium shows in its comp...
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Rhenium
Chemical Element
The 75th Element in the Periodic Table
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Tungsten
Tungsten (pronounced /ˈtʌŋstən/), also known as wolfram (/ˈwʊlfrəm/, WOOL-frəm), is a chemical element with the chemical symbol W and atomic number...
Symbol:
- Re
Atomic mass:
| Mass | Uncertainty |
|---|---|
|
|
Electron affinity:
| Value | Uncertainty |
|---|---|
|
|
Electronegativity (Pauling scale):
- 1.9
Covalent radius:
- 1.59 pm (6.26E-8 )
Van der Waals radius:
- 205 pm (0.00000807 )
Isotopes:
- Rhenium-188
- Rhenium-161
- Rhenium-167
- Rhenium-185
- Rhenium-179
- Rhenium-172
- Rhenium-166
- Rhenium-189
- Rhenium-175
- Rhenium-168
Melting Point:
- 3,181.85 °C (5759.39 °F )
Boiling Point:
- 5,596.85 °C (10106.4 °F )
Chemical series:
Periodic table block:
Ionization Energy:
- 7.8335 eV (0.0000078335 MeV )
Discovery Date:
- 1925
Discovering Country:
Electron Configuration:
- Xe 4f14 5d5 6s2