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Actinium Mercury Comparison


Mercury Actinium comparison


Periodic Table

Symbol
Ac   
Hg   

Group Number
Not Available   
12   
6

Period Number
7   
6   

Block
f block   
d block   

Element Family
Actinide   
Transition Metal   

CAS Number
7440348   
99+
7439976   
99+

Space Group Name
Fm_ 3m   
R_ 3m   

Space Group Number
225.00   
2
166.00   
6

Facts

Interesting Facts
Not Available   
  • 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
Obtained by Treating Radium with Neutrons, Ores of metals   
Mining, Ores of Minerals   

History
  
  

Who Discovered
Friedrich Oskar Giesel   
Ancient Chinese and Indians   

Discovery
In 1902   
Before 2000 BCE   

Abundance
  
  

Abundance In Earth's Crust
Not Available   
0.05 %   
9

Uses

Uses & Benefits
  • Actinium metal has a great source of alpha rays but it is hardly used outside research purpose.
  
  • 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
NA   
Electrical Industry, Electronic Industry   

Medical Uses
NA   
Dentistry   

Other Uses
Alloys, Nuclear Research, Research Purposes   
Alloys, Mirror Manufacturing, Pharmaceutical Industry   

Biological Properties
  
  

Toxicity
Toxic   
Highly Toxic   

Present in Human Body
No   
Yes   

In Blood
0.00 Blood/mg dm-3   
37
0.01 Blood/mg dm-3   
23

In Bone
0.00 p.p.m.   
36
0.45 p.p.m.   
19

Physical Properties

Melting Point
1,227.00 °C   
38
Not Available   

Boiling Point
3,200.00 °C   
26
356.58 °C   
99+

Appearance
  
  

Physical State
Solid   
Liquid   

Color
Silvery White   
Silver   

Luster
NA   
NA   

Hardness
  
  

Speed of Sound
Not Available   
1,451.40 m/s   
99+

Optical Properties
  
  

Refractive Index
Not Available   
1.00   
3

Reflectivity
Not Available   
73.00 %   
8

Allotropes
No   
No   

α Allotropes
Not Available   
Not Available   

β Allotropes
Not Available   
Not Available   

γ Allotropes
Not Available   
Not Available   

Chemical Properties

Chemical Formula
Ac   
Hg   

Isotopes
  
  

Known Isotopes
29   
10
34   
5

Electronegativity
  
  

Pauling Electronegativity
1.10   
99+
2.00   
7

Sanderson Electronegativity
Not Available   
2.20   
7

Allred Rochow Electronegativity
1.00   
36
1.44   
17

Mulliken-Jaffe Electronegativity
Not Available   
1.81   
9

Allen Electronegativity
Not Available   
1.44   
30

Electropositivity
  
  

Pauling Electropositivity
2.90   
10
2.00   
99+

Ionization Energies
  
  

1st Energy Level
499.00 kJ/mol   
99+
1,007.10 kJ/mol   
4

2nd Energy Level
1,170.00 kJ/mol   
99+
1,810.00 kJ/mol   
20

3rd Energy Level
1,900.00 kJ/mol   
99+
3,300.00 kJ/mol   
20

4th Energy Level
4,700.00 kJ/mol   
23
Not Available   

Electrochemical Equivalent
2.82 g/amp-hr   
18
3.74 g/amp-hr   
10

Electron Work Function
Not Available   
4.49 eV   
15

Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility   
Flammability, Ionization, Solubility   

Atomic Properties

Atomic Number
89   
29
80   
36

Electron Configuration
[Rn] 6d1 7s2   
[Xe] 4f14 5d10 6s2   

Crystal Structure
Face Centered Cubic (FCC)   
Rhombohedral (RHO)   

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

Atom
  
  

Number of Protons
89   
29
80   
36

Number of Neutrons
138   
16
121   
22

Number of Electrons
89   
29
80   
36

Radius of an Atom
  
  

Atomic Radius
195.00 pm   
7
151.00 pm   
32

Covalent Radius
Not Available   
132.00 pm   
99+

Van der Waals Radius
Not Available   
155.00 pm   
99+

Atomic Weight
227.00 amu   
25
200.59 amu   
32

Atomic Volume
22.54 cm3/mol   
11
14.82 cm3/mol   
35

Adjacent Atomic Numbers
  
  

Previous Element
Radium
  
Gold
  

Next Element
Thorium
  
Thallium
  

Valence Electron Potential
38.60 (-eV)   
99+
28.20 (-eV)   
99+

Lattice Constant
567.00 pm   
8
300.50 pm   
99+

Lattice Angles
π/2, π/2, π/2   
NA   

Lattice C/A Ratio
Not Available   
Not Available   

Mechanical Properties

Density
  
  

Density At Room Temperature
10.00 g/cm3   
37
13.53 g/cm3   
24

Tensile Strength
Not Available   
Not Available   

Viscosity
Not Available   
0.00   
1

Vapor Pressure
  
  

Elasticity properties
  
  

Poisson Ratio
Not Available   
Not Available   

Other Mechanical Properties
NA   
NA   

Magnetic Properties

Magnetic Characteristics
  
  

Specific Gravity
10.07   
28
13.53   
16

Magnetic Ordering
Paramagnetic   
Diamagnetic   

Electrical Properties
  
  

Electrical Property
Unknown   
Conductor   

Resistivity
Not Available   
961.00 nΩ·m   
1

Electrical Conductivity
Not Available   
0.01 106/cm Ω   
99+

Electron Affinity
Not Available   
0.00 kJ/mol   
40

Thermal Properties

Specific Heat
0.12 J/(kg K)   
40
0.14 J/(kg K)   
38

Molar Heat Capacity
27.20 J/mol·K   
18
27.98 J/mol·K   
13

Thermal Conductivity
12.00 W/m·K   
99+
8.30 W/m·K   
99+

Critical Temperature
Not Available   
1,750.00 K   
6

Thermal Expansion
Not Available   
60.40 µm/(m·K)   
5

Enthalpy
  
  

Enthalpy of Vaporization
Not Available   
56.90 kJ/mol   
99+

Enthalpy of Fusion
Not Available   
2.29 kJ/mol   
99+

Enthalpy of Atomization
301.00 kJ/mol   
36
61.50 kJ/mol   
99+

Standard Molar Entropy
56.50 J/mol.K   
25
75.80 J/mol.K   
6

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