Rhodium

Overview

English Name:

Rhodium

Latin Name:

Rhodium

Year Discovered:

1803

Discovered By:

William Hyde Wollaston

Group:

9

Period:

5

Electrons:

45

CAS Number:

7440-16-6

Cost Per 100 Grams:

$600

Atomic Properties

Electronic Configuration:

[Kr] 4d⁷ 5s¹

Ion Charge:

+3

Ionisation Energies:

719.7 kJ/mol

Atomic Radius (Empirical):

135 pm

Atomic Radius (Calculated):

140 pm

Covalent Radius:

139 pm

Van Der Waals Radius:

N/A

Ionisation Potential of An Atom:

7.458 eV

Electrons Per Layer:

2, 8, 18, 17

Atomic Multiplicities Of The Gas:

1

Atomic Weight:

102.91

Reactivity

Electron Affinity:

+0.2 kJ/mol

Valence:

3

Electronegativity:

2.2

Thermal Properties

Melting Point:

1964°C

Boiling Point:

3727°C

Critical Point:

Pressure: N/A

Temperature: N/A

Thermal Conductivity:

150 W/(m·K)

Heat Capacity:

Specific: 0.240 J/(g·K)

Molar: 25.5 J/(mol·K)

Thermal Coefficient:

0.000012

Enthalpy:

Fusion: 18.0 kJ/mol

Vaporisation: 400 kJ/mol

Atomization: 200 kJ/mol

Curie Temperature:

N/A

Neel Temperature:

N/A

Superconductivity Point:

N/A

Physical and Chemical Properties

State of matter (25° C/ 77°F):

Solid

Density:

Solid: 12.41 g/cm³

Molar Volume (Vmol):

8.29 L/mol

Speed of Sound (Vs):

3200 m/s

Hardness:

N/A

Bulk Modulus (K):

170 GPa

Shear Modulus (G):

N/A

Young's Modulus (E):

N/A

Color:

Silvery-white

Brinell Hardness (MPa):

N/A

Liquid Density (Kg/m^3):

N/A

Hardness of Mohs:

N/A

Refractive Index:

N/A

Vickers Hardness (MPa):

N/A

Crystal Structure:

Cubic

Electromagnetic Properties

Electrical Type:

Conductor

Resistivity:

4.0 × 10^-7 Ω·m

Magnetic Type:

Diamagnetic

Superconductivity:

Not applicable

Volume Magnetic Susceptibility:

-5.0 × 10^-6

Mass Magnetic Susceptibility:

-4.0 × 10^-6 m³/kg

Molar Mass Susceptibility:

-1.0 × 10^-5 m³/mol

Electrical Conductivity:

1.0 × 10^6 S/m

Mass (γ_mass):

3.0 × 10^-26 kg

Mass (γ_mol):

3.0 × 10^-23 mol

Volume (γ_vol):

8.29 L

Grid Parameters

Crystal Structure:

Cubic

Grid Parameters:

N/A

Attitude:

N/A

Debye Temperature:

N/A

Safety and Precautions

Signal Word:

Warning

Hazard Statements:

H261

Precautionary Statements:

P220, P244, P370 + P376

RTECS Number:

Not available

Risk:

Flammability: Non-flammable
Health Risk: Irritant
Reactivity: Stable
Specific Risk: None

Importance

Main sources:

Mining, recycling

Main Usage:

Catalytic converters, jewelry, electrical contacts

Nuclear Properties

Radioactive:

No

Isotopes:

Rh-103, Rh-105

Neutron Cross Sectional:

0.005 barns

Half Life (s):

None

Lifetime:

Stable

Prevalence

Universe:

0.0007%

Sun:

0.0007%

Oceans:

N/A

Humans:

N/A

Earth's Crust:

0.0007%

Meteorites:

N/A