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What is Rhodium?

All Metals

Nihonium
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Moscovium
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Tennessine
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Rhodium In Periodic Table

Symbol
Rh

Group Number
9
9
📊

Period Number
5
📊

Block
d block
📊

Element Family
Transition Metal
📊

CAS Number
7440166
63

Space Group Name
Fm_ 3m

Space Group Number
225.00
2
📊

Facts about Rhodium

Interesting Facts
  • Rhodium is the rarest element out of all non-radioactive metals on the earth .
  • Rhodium is one of the most durable and hard metal, which also have high reflectance.

Sources
Earth's crust, Found As a By-product, Found in Minerals, Mining

History of Rhodium

Who Discovered
William Hyde Wollaston

Discovery
In 1804

Abundance of Rhodium

Abundance In Universe
0.00 %
📊

Abundance In Sun
0.00 %
📊

Abundance In Meteorites
0.00 %
📊

Abundance In Earth's Crust
0.00 %
📊

Abundance In Oceans
Not Available
📊

Abundance In Humans
Not Available
📊

Uses of Rhodium

Uses & Benefits
  • Rhodium metal is mainly used in catalytic converters for cars as it reduces nitrogen oxides in exhaust gases.
  • It is used as an industrial catalyst for nitric acid, acetic acid, hydrogenation reaction, etc.

Industrial Uses
Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry

Medical Uses
NA

Other Uses
Alloys

Biological Properties

Toxicity
NA
📊

Present in Human Body
📊

In Blood
Not Available

In Bone
Not Available

Physical Properties of Rhodium

Melting Point
1,966.00 °C
12
📊

Boiling Point
3,727.00 °C
17
📊

Appearance of Rhodium

Physical State
Solid
📊

Color
Silvery White

Luster
Metallic
📊

Hardness of Rhodium

Mohs Hardness
6.00
📊

Brinell Hardness
980.00 MPa
📊

Vickers Hardness
1,100.00 MPa
📊

Speed of Sound
4,700.00 m/s
15
📊

Optical Properties

Refractive Index
Not Available
📊

Reflectivity
84.00 %
📊

Allotropes

α Allotropes
Not Available

β Allotropes
Not Available

γ Allotropes
Not Available

Chemical Properties of Rhodium

Chemical Formula
Rh

Isotopes of Rhodium

Known Isotopes
16
📊

Electronegativity

Pauling Electronegativity
2.28
📊

Sanderson Electronegativity
Not Available
📊

Allred Rochow Electronegativity
1.45
📊

Mulliken-Jaffe Electronegativity
Not Available
📊

Allen Electronegativity
1.56
📊

Electropositivity

Pauling Electropositivity
1.72
📊

Ionization Energies

1st Energy Level
719.70 kJ/mol
📊

2nd Energy Level
1,740.00 kJ/mol
📊

3rd Energy Level
2,997.00 kJ/mol
📊

4th Energy Level
Not Available
📊

5th Energy Level
Not Available
📊

6th Energy Level
Not Available
📊

7th Energy level
Not Available
📊

8th Energy Level
Not Available
📊

9th Energy Level
Not Available
📊

10th Energy Level
Not Available
📊

11th Energy Level
Not Available

12th Energy Level
Not Available

13th Energy Level
Not Available

14th Energy Level
Not Available

15th Energy Level
Not Available

16th Energy Level
Not Available

17th Energy Level
Not Available

18th Energy Level
Not Available
📊

19th Energy Level
Not Available

20th Energy Level
Not Available

21st Energy Level
Not Available

22nd Energy Level
Not Available

23rd Energy Level
Not Available

24th Energy Level
Not Available

25th Energy Level
Not Available

26th Energy Level
Not Available

27th Energy Level
Not Available

28th Energy Level
Not Available

29th Energy Level
Not Available

30th Energy Level
Not Available

Electrochemical Equivalent
1.28 g/amp-hr
50
📊

Electron Work Function
4.98 eV
6
📊

Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes

Atomic Properties of Rhodium

Atomic Number
45
67
📊

Electron Configuration
[Kr] 4d8 5s1

Crystal Structure
Face Centered Cubic (FCC)
📊

Crystal Lattice
FCC-Crystal-Structure-of-Rhodium.jpg#100

Atom of Rhodium

Number of Protons
45
📊

Number of Neutrons
58
📊

Number of Electrons
45
📊

Radius of an Atom

Atomic Radius
134.00 pm
📊

Covalent Radius
142.00 pm
📊

Van der Waals Radius
200.00 pm
📊

Atomic Weight
102.91 amu
61
📊

Atomic Volume
8.30 cm3/mol
59
📊

Adjacent Atomic Numbers

Previous Element

Next Element

Valence Electron Potential
64.00 (-eV)
22
📊

Lattice Constant
380.34 pm
27
📊

Lattice Angles
π/2, π/2, π/2

Lattice C/A Ratio
Not Available
📊

Mechanical Properties of Rhodium

Density of Rhodium

Density At Room Temperature
12.41 g/cm3
📊

Density When Liquid (at m.p.)
10.70 g/cm3
📊

Tensile Strength
951.00 MPa
5
📊

Viscosity
Not Available
📊

Vapor Pressure of Rhodium

Vapor Pressure at 1000 K
Not Available
📊

Vapor Pressure at 2000 K
0.02 (Pa)
📊

Elasticity properties

Shear Modulus
150.00 GPa
📊

Bulk Modulus
275.00 GPa
📊

Young's Modulus
380.00 GPa
📊

Poisson Ratio
0.26
22
📊

Other Mechanical Properties
Malleable

Magnetic Properties of Rhodium

Magnetic Characteristics of Rhodium

Specific Gravity
12.41
📊

Magnetic Ordering
Paramagnetic
📊

Permeability
Not Available
📊

Susceptibility
Not Available
📊

Electrical Properties

Electrical Property
Conductor
📊

Resistivity
43.30 nΩ·m
📊

Electrical Conductivity
0.21 106/cm Ω
📊

Electron Affinity
109.70 kJ/mol
📊

Thermal Properties of Rhodium

Specific Heat
0.24 J/(kg K)
22
📊

Molar Heat Capacity
24.98 J/mol·K
45
📊

Thermal Conductivity
150.00 W/m·K
9
📊

Critical Temperature
Not Available

Thermal Expansion
8.20 µm/(m·K)
47
📊

Enthalpy of Rhodium

Enthalpy of Vaporization
495.40 kJ/mol
📊

Enthalpy of Fusion
21.76 kJ/mol
📊

Enthalpy of Atomization
556.50 kJ/mol
📊

Standard Molar Entropy
31.50 J/mol.K
49
📊

Rhodium Metal

Metals have been an inseparable component of major civilizations since centuries. Although metals were utilized since time unknown, researchers put considerable efforts in giving them appropriate names and defining their different properties and characteristics. This nomenclature process helped in arranging these metals in a well-organized fashion, known as the periodic table. In this periodic table, Rhodium metal is also represented by the symbol Rh. This atomic symbol of Rhodium is useful in indicating the position of metal Rh in the periodic table. If you are curious-headed or a science-geek, the common questions about metals are What is Rhodium? What are its physical, chemical, mechanical, electrical and thermal properties? Find all the relevant facts about Rh metals in the following sections.

Periodic Table of Rhodium

Periodic table of Rhodium comments over its position in the periodic table, on the basis of parameters like group number, period row, atomic number and orbital block. The metals which have electrons falling in the same sub-shell are grouped under the same block corresponding to its respective orbital. Rhodium metal belongs to Transition Metals category of the periodic table. Metals down a group have same valency while metals across a period have the same number of shells. Its group number (column number) is 9, whereas its period number is 5. It is placed under d block of the periodic table & is one of the prominent d block elements.

Rhodium Metal Properties

Metals have certain properties by which they can be distinguished from one another. Magnetic and Atomic Structure of Rhodium are few widely searched properties. Using the comparison facility, you can not only view the individual metal properties, but also compare the properties of multiple metals to get a thorough comparative analysis between the metals of your choice. Atomic number is a basic building block for the arrangement of metals in the periodic table. Atomic number of Rhodium is 45 and its atomic weight is 102.91 amu. The electrons in its atom are arranged in orbitals as [Kr] 4d8 5s1. Nuclear particles in Rhodium atom are 58 neutrons, 45 protons and 45 electrons.

Physical and Chemical Characteristics of Rhodium

Physical and chemical characteristics of Rhodium are two major criteria while comparing this metal with other metals. Physical Properties of Rhodium include its external appearance, shininess at surface, color, etc. Properties like density, viscosity, melting and boiling point are also covered in this section. At room temperature, this metal is a Silvery White Solid. It starts melting at 1,966.00 °C. All these Rhodium metal properties together define what is Rhodium?

Modern Periodic Table

Modern Periodic Table
Group →

Period ↓

1

2

3

4

5

6

7

1

H

2

3

La-Lu
Ac-Lr

4

5

6

7

8

9

10

11

12

13

B

14

C
Si
Ge

15

N
P
As
Sb

16

O
S
Se
Te

17

F
Cl
Br
I
At

18

He
Ne
Ar
Kr
Xe
Rn
Og