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Hg Element



Periodic Table

Symbol
Hg

Group Number
12 6

Period Number
6 2

Block
d block

Element Family
Transition Metal

CAS Number
7439976 81

Space Group Name
R_ 3m

Space Group Number
166.00 9

Facts

Interesting Facts
  • At room temperature mercury is found in a liquid state.
  • A coin of pound or rupees floats in mercury.
  • Because of its low melting point and boiling point it is used in thermometers.

Sources
Mining, Ores of Minerals

History

Who Discovered
Ancient Chinese and Indians

Discovery
Before 2000 BCE

Abundance

Abundance In Universe
0.09 % 2

Abundance In Sun
0.00 % 30

Abundance In Meteorites
0.00 % 54

Abundance In Earth's Crust
0.05 % 9

Abundance In Oceans
-

Abundance In Humans
0.00 % 24

Uses

Uses & Benefits
  • It is a liquid metal at room temperature, but it is a toxic heavy metal and hence many uses of mercury are under review or phased out.
  • It is manly used as a catalysts in chemical industry.

Industrial Uses
Electrical Industry, Electronic Industry

Medical Uses
Dentistry

Other Uses
Alloys, Mirror Manufacturing, Pharmaceutical Industry

Biological Properties

Toxicity
Highly Toxic

Present in Human Body
Yes

In Blood
0.01 Blood/mg dm-3 23

In Bone
0.45 p.p.m. 23

Physical

Melting Point
-38.83 °C 82

Boiling Point
356.58 °C 80

Appearance

Physical State
Liquid

Color
Silver

Luster
-

Hardness

Mohs Hardness
1.50 19

Brinell Hardness
5.00 MPa 67

Vickers Hardness
0.00 MPa 74

Speed of Sound
1,451.40 m/s 67

Optical Properties

Refractive Index
1.00 47

Reflectivity
73.00 % 10

Allotropes
No

α Allotropes
-

β Allotropes
-

γ Allotropes
-

Chemical

Chemical Formula
Hg

Isotopes

Known Isotopes
34 5

Electronegativity

Pauling Electronegativity
2.00 8

Sanderson Electronegativity
2.20 8

Allred Rochow Electronegativity
1.44 18

Mulliken-Jaffe Electronegativity
1.81 17

Allen Electronegativity
1.44 34

Electropositivity

Pauling Electropositivity
2.00 47

Ionization Energies

1st Energy Level
1,007.10 kJ/mol 4

2nd Energy Level
1,810.00 kJ/mol 21

3rd Energy Level
3,300.00 kJ/mol 20

4th Energy Level
1,007.10 kJ/mol 78

5th Energy Level
1,007.00 kJ/mol 87

6th Energy Level
1,007.00 kJ/mol 91

7th Energy level
1,007.00 kJ/mol 87

8th Energy Level
1,007.00 kJ/mol 84

9th Energy Level
1,007.00 kJ/mol 85

10th Energy Level
1,007.00 kJ/mol 79

11th Energy Level
1,007.00 kJ/mol 87

12th Energy Level
1,007.00 kJ/mol 87

13th Energy Level
1,007.00 kJ/mol 83

14th Energy Level
1,007.00 kJ/mol 71

15th Energy Level
100,700.00 kJ/mol 1

16th Energy Level
1,007.00 kJ/mol 72

17th Energy Level
1,007.00 kJ/mol 24

18th Energy Level
1,007.00 kJ/mol 86

19th Energy Level
1,007.10 kJ/mol 20

20th Energy Level
1,007.00 kJ/mol 11

21st Energy Level
1,007.00 kJ/mol 33

22nd Energy Level
1,007.00 kJ/mol 8

23rd Energy Level
1,007.00 kJ/mol 36

24th Energy Level
1,007.10 kJ/mol 3

25th Energy Level
1,007.10 kJ/mol 3

26th Energy Level
1,007.10 kJ/mol 3

27th Energy Level
1,007.10 kJ/mol 2

28th Energy Level
1,007.10 kJ/mol 5

29th Energy Level
1,007.10 kJ/mol 6

30th Energy Level
1,007.10 kJ/mol 3

Electrochemical Equivalent
3.74 g/amp-hr 10

Electron Work Function
4.49 eV 20

Other Chemical Properties
Flammability, Ionization, Solubility

Atomic

Atomic Number
80 36

Electron Configuration
[Xe] 4f14 5d10 6s2

Crystal Structure
Rhombohedral (RHO)

Crystal Lattice
RHO-Crystal-Structure-of-Mercury.jpg#100

Atom

Number of Protons
80 36

Number of Neutrons
121 23

Number of Electrons
80 36

Radius of an Atom

Atomic Radius
151.00 pm 34

Covalent Radius
132.00 pm 50

Van der Waals Radius
155.00 pm 49

Atomic Weight
200.59 amu 32

Atomic Volume
14.82 cm3/mol 51

Adjacent Atomic Numbers

Previous Element
3

Next Element
46

Valence Electron Potential
28.20 (-eV) 56

Lattice Constant
300.50 pm 66

Lattice Angles
-

Lattice C/A Ratio
0.42 65

Mechanical

Density

Density At Room Temperature
13.53 g/cm3 25

Density When Liquid (at m.p.)
13.55 g/cm3 27

Tensile Strength
15.00 MPa 48

Viscosity
0.00 4

Vapor Pressure

Vapor Pressure at 1000 K
0.00 (Pa) 22

Vapor Pressure at 2000 K
0.00 (Pa) 45

Elasticity properties

Shear Modulus
30.00 GPa 27

Bulk Modulus
25.00 GPa 53

Young's Modulus
45.00 GPa 43

Poisson Ratio
0.44 3

Other Mechanical Properties
-

Magnetic

Magnetic Characteristics

Specific Gravity
13.53 27

Magnetic Ordering
Diamagnetic

Permeability
0.00 H/m 10

Susceptibility
0.00 20

Electrical Properties

Electrical Property
Conductor

Resistivity
961.00 nΩ·m 1

Electrical Conductivity
0.01 106/cm Ω 62

Electron Affinity
0.00 kJ/mol 49

Thermal

Specific Heat
0.14 J/(kg K) 39

Molar Heat Capacity
27.98 J/mol·K 16

Thermal Conductivity
8.30 W/m·K 69

Critical Temperature
1,750.00 K 33

Thermal Expansion
60.40 µm/(m·K) 5

Enthalpy

Enthalpy of Vaporization
56.90 kJ/mol 86

Enthalpy of Fusion
2.29 kJ/mol 69

Enthalpy of Atomization
61.50 kJ/mol 74

Standard Molar Entropy
75.80 J/mol.K 6

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