45
Rh
Rhodium
102.905502
Basic Information
Bohr Model
Descriptive Numbers
Mass
Periodic Position
Classification
Abundance
Color
Atomic Radius
Temperature
Density
Heat
Speed of Sound
Electrical Resistance
Magnetic Properties
Elasticity
Hardness
Etymology
Discovery & Isolation
Production & Use
Radioactivity
Electron Affinity
Dipole Polarity
Lattice
Electron & Quantum
List of Compounds
Basic Information
Name
Rhodium
Atomic Number
45
Appearance
Silvery white metallic
Phase At STP
Solid
Spectrum Image
Source
WikipediaBohr Model
Static
Interactive
Descriptive Numbers
CAS Number
7440-16-6
CID Number
CID23948
DOT Number
3089
RTECS Number
RTECSVI9069000
Mendeleev Number
64
Pettifor Number
66
Space Group Number
225
Glawe Number
63
Mass
Atomic Mass
102.905502 Da
Uncertainty
0.00002
Periodic Position
X Position
9
Y Position
5
Period
5
Group
9
Classification
Block
d
Category
Transition Metal
Geochemical
I am Metal
Goldschmidt
Siderophile
Electrical Type
Conductive
Abundance
Sun
4e-7 mole ratio to silicon
Earth Crust
1e-9 g
Solar System
3.4e-7 mole ratio to silicon
Meteorites
0.000018 %
Color
Jmol
#0A7D8C
Molcas Gv
#0A7D8C
CPK
#FF1493
Atomic Radius
Empirical
135
Calculated
173
Batsanov
200
Rahm
233
Uff
292.9
Mm3
234
Alvarez
244
Covalent (Single Bound)
135
Covalent (Triple Bound)
106
Covalent (Cordero)
142
Covalent (Pyykko)
125
Covalent (Pyykko Double)
110
Covalent (Pyykko Triple)
106
Mendeleev
125
C12
134
Metallic
134
Temperature
Melting/Freeze (USE)
2237 °K
Melting/Freeze (WEL)
2237 °K
Melting/Freeze (CRC)
2237 °K
Melting/Freeze (LNG)
2236 °K
Boiling/Density (USE)
3968 °K
Boiling/Density (WEL)
3968 °K
Boiling/Density (CRC)
3968 °K
Boiling/Density (LNG)
4000 °K
Boiling/Density (Zhang)
4000 °K
Density
STP
12.41 kg/cm³
Solid (WEL)
12450 kg/cm³
Solid (CRC)
12400 kg/cm³
Solid (LNG)
12410 kg/cm³
Liquid (CR2)
10700 kg/cm³
Heat
Molar Volume
8.28 cm³/mol
Atomic Volume
8.3 cm³
Heat Of Fusion USE
21.8 kJ/mol
Heat Of Fusion CRC
26.59 kJ/mol
Heat Of Fusion LNG
26.59 kJ/mol
Heat Of Fusion WEL
21.7 kJ/mol
Evaporation USE
494 kJ/mol
Evaporation LNG
494 kJ/mol
Evaporation WEL
495 kJ/mol
Evaporation Zhang
493 kJ/mol
Molar Heat
24.98 J/molK
Heat Capacity USE
0.244 J/gK
Heat Capacity CRC
24.98 J/gK
Heat Capacity LNG
24.98 J/gK
Heat Capacity WEL
25 J/gK
Thermal Conductivity
150 W/m*K
Thermal Expansion
0.0000082 1/K
Adiabatic Index
N/A
Speed of Sound
Extensional
4700 m/s
Electrical Resistance
273k
43.3 nΩm
Magnetic Properties
Order
paramanyetic
Susceptibility
1.4e-8 m3/kg
Elasticity
Shear Modulus
150 GPa
Bulk Modulus
380 GPa
Poisson Ratio
0.26 ν
Youngs Modulus
275 GPa
Hardness
Mohs
6
Brinell
980–1350
Vickers
1100–8000
Etymology
Description
It is a silvery white transition metal. It is found together with platinum and is used in some platinum alloys. It is not attacked by acids, it just dissolves in aqua regia. In 1803 W.H. It was discovered by Wollaston.
Language Of Origin
Greek
Origin Of Word
From the Greek word rhodos, meaning rose-colored
Meaning
rose
Symbol Origin
descriptive (color)
Etymological Description
From the Greek word rhodon meaning "rose". It is so named because of its rose red compounds.
Discovery & Isolation
Observed/Predicted By
H. Wollaston
Observed/Discovery Year
1804
Discovery Location
Isolated Sample By
H. Wollaston
Isolated Sample Year
1804
Production & Use
Sources
It is obtained as a by-product of nickel production.
Uses
It is used in coatings to prevent corrosion of high quality scientific equipment. It is also used together with platinum in thermocouple production.
Radioactivity
Half Life
Stable
Lifetime
Stable
Neutron Mass Absorption
0.063
Neutron Cross Section
145
Electron Affinity
Proton Affinity
768
Electron Affinity (eV)
1.137
Electron Affinity (kJ/mol)
110.27
Electron Affinity (pauling)
2.28
Electron Affinity (allen)
9.259
Electron Affinity (ghosh)
0.1408379
Dipole Polarity
Accepted
66
Uncertainty
10
C6 GB
708
Lattice
Constant Internal Default Radius
3.8
Constant
380.34, 380.34, 380.34
Strucutre
FCC
Angles
p/2, p/2, p/2
Electron & Quantum
Oxidation States
−3,−1,0,1,2,3,4,5,6
Electron Configuration
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s1 4d8
Quantum Number
4F9/2
Electron Configuration Semantic
[Kr] 4d8 5s1
Shells-0
2
Shells-1
8
Shells-2
18
Shells-3
16
Shells-4
1
Ionization Energies-0
719.7
Ionization Energies-1
1740
Ionization Energies-2
2997
List of Compounds
1-10 of 80 compounds
| Formula | Names |
|---|---|
| Rh | rhodium rhodium metal |
| RhCl3 | rhodium(III) chloride rhodium chloride rhodium(III) chloride (1:3) rhodium trichloride trichlororhodium |
| I3Rh | rhodium(III) iodide rhodium triiodide |
| RhO2 | rhodium dioxide diketorhodium dioxorhodium rhodium(IV) oxide rhodium oxide |
| Rh2O3 | rhodium(III) oxide dirhodium trioxide keto-(ketorhodiooxy)rhodium oxo-(oxorhodiooxy)rhodium rhodium oxiderhodium trioxide |
| PtRh | platinum/rhodium alloy platinum; rhodium |
| RhBr3 | rhodium(III) bromide |
| RhF3 | rhodium(III) fluoride |
| RhF6 | rhodium(VI) fluoride |
| Rh6(CO)16 | hexarhodium(0)hexadecacarbonyl carbon monoxide; rhodium rhodium(0)carbonyl |
