Rhenium
Rhenium (pronunciation: /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 estimated average concentration of 1 part per billion (ppb), rhenium is one of the rarest elements in the Earth's crust. The free element has the third-highest melting point and highest boiling point of any element. Rhenium resembles mangane...
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Chemical Element
The 75th Element in the Periodic Table
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Tungsten
Tungsten /ˈtʌŋstən/, also known as wolfram /ˈwʊlfrəm/ (WUUL-frəm), is a chemical element with the chemical symbol W and atomic number 74. The word...
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 )
Chemical series:
Ionization Energy:
- 7.8335 eV (0.0000078335 MeV )
Discovery Date:
- 1925
Discovering Country:
Electron Configuration:
- Xe 4f14 5d5 6s2