#75
Rhenium
transition metal· Solid·186.2071 u
Rhenium is a chemical element with 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.
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Identity
- Symbol
- Re
- Atomic Number
- 75
- Atomic Mass
- 186.2071 u
- Category
- transition metal
- Block
- d-block
- Period
- 6
- Group
- 7
- Appearance
- silvery-grayish
- Year Discovered
- 1925 CE
- Discovered By
- Masataka Ogawa
- Named By
- Walter Noddack
Electrons
- Configuration
- [Xe] 4f14 5d5 6s2
- Full Configuration
- 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d5
- Shells
- 2, 8, 18, 32, 13, 2
- Electronegativity
- 1.9
- Electron Affinity
- 5.8273
- Oxidation States
- +7, +6, +4
- Ionization Energies
- 760, 1260, 2510, 3640
Physical Properties
- State at
- Solid
- Melting Point
- 3459
- Boiling Point
- 5869
- Density
- 21.02
- Molar Heat
- 25.48 J/(mol·K)
- Crystal Structure
- HEX
- Magnetic Ordering
- Paramagnetic
Mechanical
- Covalent Radius
- 151 pm
- Van der Waals
- 217 pm
- Metallic Radius
- 137 pm
- Mohs Hardness
- 7
- Brinell Hardness
- 1320 MPa MPa
- Vickers Hardness
- 2450 MPa MPa
- Bulk Modulus
- 370 GPa GPa
- Shear Modulus
- 178 GPa GPa
- Young's Modulus
- 463 GPa GPa
Thermal & Electrical
- Thermal Conductivity
- 48 W/(m K) W/(m·K)
- Electrical Conductivity
- 5.56 MS/m S/m
- Specific Heat
- 137 J/(kg K) J/(g·K)
- Heat of Vaporization
- 704 kJ/mol kJ/mol
- Heat of Fusion
- 60.4 kJ/mol kJ/mol
Abundance
- Universe
- 400 ppt
- Sun
- 1 ppb
- Meteorite
- 49.0 ppb
- Earth's Crust
- 700 ppt
- Ocean
- 4.00 ppt
- Human Body
- 0