Symbol
Hg
  
Na
  
Period Number
6
  
3
  
Block
d block
  
s block
  
Element Family
Transition Metal
  
Alkali
  
Space Group Name
R_ 3m
  
Im_ 3m
  
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.
  
- At room temperature Sodium metal is very soft as it can be chopped down into pieces with butter knife.
- The most common compound of Sodium is NaCl (Salt).
  
Sources
Mining, Ores of Minerals
  
By Electrolysis Process, Mining
  
History
  
  
Who Discovered
Ancient Chinese and Indians
  
Humphry Davy
  
Discovery
Before 2000 BCE
  
In 1807
  
Abundance
  
  
Abundance In Universe
Not Available
  
Abundance In Sun
~-9999 %
  
Abundance In Meteorites
Not Available
  
Abundance In Earth's Crust
Abundance In Oceans
Not Available
  
Abundance In Humans
Not Available
  
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.
  
- In some nuclear reactors sodium is used as a heat exchanger.
- Compound of Sodium metals called Salt (Sodium chloride) is used in Food.
  
Industrial Uses
Electrical Industry, Electronic Industry
  
Electrical Industry, Electronic Industry
  
Medical Uses
Dentistry
  
Pharmaceutical Industry
  
Other Uses
Alloys, Mirror Manufacturing, Pharmaceutical Industry
  
Alloys
  
Biological Properties
  
  
Toxicity
Highly Toxic
  
Toxic
  
Present in Human Body
Yes
  
Yes
  
In Blood
0.01 Blood/mg dm-3
  
23
1,970.00 Blood/mg dm-3
  
1
In Bone
0.45 p.p.m.
  
19
10,000.00 p.p.m.
  
2
Melting Point
Not Available
  
Appearance
  
  
Physical State
Liquid
  
Solid
  
Color
Silver
  
Silvery White
  
Luster
NA
  
Metallic
  
Hardness
  
  
Mohs Hardness
Not Available
  
Brinell Hardness
Not Available
  
Speed of Sound
1,451.40 m/s
  
99+
3,200.00 m/s
  
24
Optical Properties
  
  
Refractive Index
Not Available
  
Reflectivity
Not Available
  
Allotropes
No
  
No
  
α Allotropes
Not Available
  
Not Available
  
β Allotropes
Not Available
  
Not Available
  
γ Allotropes
Not Available
  
Not Available
  
Chemical Formula
Hg
  
Na
  
Isotopes
  
  
Electronegativity
  
  
Pauling Electronegativity
Sanderson Electronegativity
Allred Rochow Electronegativity
Mulliken-Jaffe Electronegativity
Electropositivity
  
  
Pauling Electropositivity
Ionization Energies
  
  
1st Energy Level
1,007.10 kJ/mol
  
4
495.80 kJ/mol
  
99+
2nd Energy Level
1,810.00 kJ/mol
  
20
4,562.00 kJ/mol
  
4
3rd Energy Level
3,300.00 kJ/mol
  
20
6,910.30 kJ/mol
  
6
4th Energy Level
Not Available
  
9,543.00 kJ/mol
  
5
5th Energy Level
Not Available
  
13,354.00 kJ/mol
  
4
6th Energy Level
Not Available
  
16,613.00 kJ/mol
  
4
7th Energy level
Not Available
  
20,117.00 kJ/mol
  
4
8th Energy Level
Not Available
  
25,496.00 kJ/mol
  
4
9th Energy Level
Not Available
  
28,932.00 kJ/mol
  
4
10th Energy Level
Not Available
  
141,362.00 kJ/mol
  
2
11th Energy Level
Not Available
  
159,076.00 kJ/mol
  
2
Electrochemical Equivalent
3.74 g/amp-hr
  
10
0.86 g/amp-hr
  
99+
Other Chemical Properties
Flammability, Ionization, Solubility
  
Chemical Stability, Corrosion, Flammability, Ionization, Solubility
  
Electron Configuration
[Xe] 4f14 5d10 6s2
  
[Ne] 3s1
  
Crystal Structure
Rhombohedral (RHO)
  
Body Centered Cubic (BCC)
  
Crystal Lattice
RHO-Crystal-Structure-of-Mercury.jpg#100
  
BCC-Crystal-Structure-.jpg#100
  
Atom
  
  
Radius of an Atom
  
  
Atomic Volume
14.82 cm3/mol
  
35
23.70 cm3/mol
  
10
Adjacent Atomic Numbers
  
  
Valence Electron Potential
28.20 (-eV)
  
99+
14.10 (-eV)
  
99+
Lattice Angles
NA
  
π/2, π/2, π/2
  
Lattice C/A Ratio
Not Available
  
Not Available
  
Density
  
  
Density At Room Temperature
13.53 g/cm3
  
24
0.97 g/cm3
  
99+
Density When Liquid (at m.p.)
Not Available
  
0.93 g/cm3
  
99+
Tensile Strength
Not Available
  
Not Available
  
Viscosity
Not Available
  
Vapor Pressure
  
  
Elasticity properties
  
  
Shear Modulus
Not Available
  
Bulk Modulus
Not Available
  
Young's Modulus
Not Available
  
Poisson Ratio
Not Available
  
Not Available
  
Other Mechanical Properties
NA
  
NA
  
Magnetic Characteristics
  
  
Magnetic Ordering
Diamagnetic
  
Paramagnetic
  
Electrical Properties
  
  
Electrical Property
Conductor
  
Conductor
  
Resistivity
47.70 nΩ·m
  
99+
Electrical Conductivity
0.01 106/cm Ω
  
99+
0.21 106/cm Ω
  
9
Electron Affinity
0.00 kJ/mol
  
40
52.80 kJ/mol
  
19
Specific Heat
0.14 J/(kg K)
  
38
1.23 J/(kg K)
  
3
Molar Heat Capacity
27.98 J/mol·K
  
13
28.23 J/mol·K
  
10
Thermal Conductivity
8.30 W/m·K
  
99+
142.00 W/m·K
  
11
Thermal Expansion
60.40 µm/(m·K)
  
5
71.00 µm/(m·K)
  
4
Enthalpy
  
  
Enthalpy of Vaporization
56.90 kJ/mol
  
99+
89.04 kJ/mol
  
99+
Enthalpy of Fusion
2.29 kJ/mol
  
99+
2.59 kJ/mol
  
99+
Enthalpy of Atomization
61.50 kJ/mol
  
99+
108.40 kJ/mol
  
99+
Standard Molar Entropy
75.80 J/mol.K
  
6
51.30 J/mol.K
  
28