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What is Osmium?

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Nihonium
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Osmium In Periodic Table

Symbol
Os

Group Number
8
10
📊

Period Number
6
📊

Block
d block
📊

Element Family
Transition Metal
📊

CAS Number
7440042
75

Space Group Name
P63/mmc

Space Group Number
194.00
5
📊

Facts about Osmium

Interesting Facts
  • Osmium metal does not oxidize in air unless it is heated.
  • But if it heated den it forms Osmium Tetroxide, which is highly toxic.

Sources
Found As a By-product, Found in Minerals, Mining

History of Osmium

Who Discovered
Smithson Tennant

Discovery
In 1803

Abundance of Osmium

Abundance In Universe
0.00 %
21
📊

Abundance In Sun
0.00 %
26
📊

Abundance In Meteorites
0.00 %
28
📊

Abundance In Earth's Crust
0.00 %
53
📊

Abundance In Oceans
Not Available
📊

Abundance In Humans
Not Available
📊

Uses of Osmium

Uses & Benefits
  • Its has very limited uses and its alloys are very hard and are used in the manufacturing of pen tips, pivots, needles and electrical contacts.
  • It is also used as industrial catalyst to speed up the chemical reaction.

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

Medical Uses
NA

Other Uses
Alloys

Biological Properties

Toxicity
Highly Toxic
📊

Present in Human Body
📊

In Blood
Not Available

In Bone
Not Available

Physical Properties of Osmium

Melting Point
3,045.00 °C
3
📊

Boiling Point
5,027.00 °C
6
📊

Appearance of Osmium

Physical State
Solid
📊

Color
Silvery Bluish-Gray

Luster
Metallic
📊

Hardness of Osmium

Mohs Hardness
7.00
3
📊

Brinell Hardness
3,490.00 MPa
1
📊

Vickers Hardness
Not Available
📊

Speed of Sound
4,940.00 m/s
11
📊

Optical Properties

Refractive Index
Not Available
📊

Reflectivity
Not Available
📊

Allotropes

α Allotropes
Not Available

β Allotropes
Not Available

γ Allotropes
Not Available

Chemical Properties of Osmium

Chemical Formula
Os

Isotopes of Osmium

Known Isotopes
35
4
📊

Electronegativity

Pauling Electronegativity
2.20
4
📊

Sanderson Electronegativity
Not Available
📊

Allred Rochow Electronegativity
1.52
12
📊

Mulliken-Jaffe Electronegativity
Not Available
📊

Allen Electronegativity
1.65
19
📊

Electropositivity

Pauling Electropositivity
1.80
49
📊

Ionization Energies

1st Energy Level
840.00 kJ/mol
12
📊

2nd Energy Level
1,309.80 kJ/mol
53
📊

3rd Energy Level
1,600.00 kJ/mol
82
📊

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
1.77 g/amp-hr
38
📊

Electron Work Function
4.83 eV
8
📊

Other Chemical Properties
Chemical Stability, Ionization, Solubility

Atomic Properties of Osmium

Atomic Number
76
40
📊

Electron Configuration
[Xe] 4f14 5d6 6s2

Crystal Structure
Hexagonal Close Packed (HCP)
📊

Crystal Lattice
BCC-Crystal-Structure-.jpg#100

Atom of Osmium

Number of Protons
76
39
📊

Number of Neutrons
114
26
📊

Number of Electrons
76
39
📊

Radius of an Atom

Atomic Radius
133.80 pm
44
📊

Covalent Radius
Not Available
📊

Van der Waals Radius
216.00 pm
24
📊

Atomic Weight
190.23 amu
35
📊

Atomic Volume
8.49 cm3/mol
58
📊

Adjacent Atomic Numbers

Previous Element

Next Element

Valence Electron Potential
91.40 (-eV)
12
📊

Lattice Constant
273.44 pm
66
📊

Lattice Angles
π/2, π/2, 2 π/3

Lattice C/A Ratio
1.58
14
📊

Mechanical Properties of Osmium

Density of Osmium

Density At Room Temperature
22.59 g/cm3
9
📊

Density When Liquid (at m.p.)
20.00 g/cm3
1
📊

Tensile Strength
1,000.00 MPa
4
📊

Viscosity
Not Available
📊

Vapor Pressure of Osmium

Vapor Pressure at 1000 K
Not Available
📊

Vapor Pressure at 2000 K
0.00 (Pa)
28
📊

Elasticity properties

Shear Modulus
222.00 GPa
1
📊

Bulk Modulus
462.00 GPa
1
📊

Young's Modulus
Not Available
📊

Poisson Ratio
0.25
24
📊

Other Mechanical Properties
Ductile

Magnetic Properties of Osmium

Magnetic Characteristics of Osmium

Specific Gravity
22.57
2
📊

Magnetic Ordering
Paramagnetic
📊

Permeability
Not Available
📊

Susceptibility
Not Available
📊

Electrical Properties

Electrical Property
Conductor
📊

Resistivity
81.20 nΩ·m
35
📊

Electrical Conductivity
0.11 106/cm Ω
18
📊

Electron Affinity
106.10 kJ/mol
9
📊

Thermal Properties of Osmium

Specific Heat
0.13 J/(kg K)
39
📊

Molar Heat Capacity
24.70 J/mol·K
49
📊

Thermal Conductivity
87.60 W/m·K
19
📊

Critical Temperature
Not Available

Thermal Expansion
5.10 µm/(m·K)
56
📊

Enthalpy of Osmium

Enthalpy of Vaporization
627.60 kJ/mol
7
📊

Enthalpy of Fusion
29.30 kJ/mol
4
📊

Enthalpy of Atomization
669.00 kJ/mol
6
📊

Standard Molar Entropy
32.60 J/mol.K
47
📊

Osmium 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, Osmium metal is also represented by the symbol Os. This atomic symbol of Osmium is useful in indicating the position of metal Os in the periodic table. If you are curious-headed or a science-geek, the common questions about metals are What is Osmium? What are its physical, chemical, mechanical, electrical and thermal properties? Find all the relevant facts about Os metals in the following sections.

Periodic Table of Osmium

Periodic table of Osmium 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. Osmium 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 8, whereas its period number is 6. It is placed under d block of the periodic table & is one of the prominent d block elements.

Osmium Metal Properties

Metals have certain properties by which they can be distinguished from one another. Magnetic and Atomic Structure of Osmium 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 Osmium is 76 and its atomic weight is 190.23 amu. The electrons in its atom are arranged in orbitals as [Xe] 4f14 5d6 6s2. Nuclear particles in Osmium atom are 114 neutrons, 76 protons and 76 electrons.

Physical and Chemical Characteristics of Osmium

Physical and chemical characteristics of Osmium are two major criteria while comparing this metal with other metals. Physical Properties of Osmium 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 Bluish-Gray Solid. It starts melting at 3,045.00 °C. All these Osmium metal properties together define what is Osmium?

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