#45
Rhodium
transition metal· Solid·102.905502 u
Rhodium is a chemical element with symbol Rh and atomic number 45. It is a rare, silvery-white, hard, and chemically inert transition metal. It is a member of the platinum group.
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Identity
- Symbol
- Rh
- Atomic Number
- 45
- Atomic Mass
- 102.905502 u
- Category
- transition metal
- Block
- d-block
- Period
- 5
- Group
- 9
- Appearance
- silvery white metallic
- Year Discovered
- 1803 CE
- Discovered By
- William Hyde Wollaston
- Named By
- rose
Electrons
- Configuration
- [Kr] 4d8 5s1
- Full Configuration
- 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s1 4d8
- Shells
- 2, 8, 18, 16, 1
- Electronegativity
- 2.28
- Electron Affinity
- 110.27
- Oxidation States
- +3
- Ionization Energies
- 719.7, 1740, 2997
Physical Properties
- State at
- Solid
- Melting Point
- 2237
- Boiling Point
- 3968
- Density
- 12.41
- Molar Heat
- 24.98 J/(mol·K)
- Crystal Structure
- FCC
- Magnetic Ordering
- Paramagnetic
Mechanical
- Atomic Radius
- 173 pm
- Covalent Radius
- 142 pm
- Van der Waals
- 195 pm
- Metallic Radius
- 134 pm
- Mohs Hardness
- 6
- Brinell Hardness
- 1100 MPa MPa
- Vickers Hardness
- 1246 MPa MPa
- Bulk Modulus
- 380 GPa GPa
- Shear Modulus
- 150 GPa GPa
- Young's Modulus
- 380 GPa GPa
Thermal & Electrical
- Thermal Conductivity
- 150 W/(m K) W/(m·K)
- Electrical Conductivity
- 22300000 S/m S/m
- Specific Heat
- 243 J/(kg K) J/(g·K)
- Heat of Vaporization
- 494 kJ/mol kJ/mol
- Heat of Fusion
- 26.6 kJ/mol kJ/mol
Abundance
- Universe
- 600 ppt
- Sun
- 1.00 ppb
- Meteorite
- 110 ppb
- Earth's Crust
- 12.41 ppm
- Ocean
- 1 ppt
- Human Body
- 0