Mercury Actinium Comparison
Periodic Table
Symbol
Hg
Ac
Group Number
12
6
Not Available
Period Number
6
7
Block
d block
f block
Element Family
Transition Metal
Actinide
CAS Number
7439976
99+
7440348
99+
Space Group Name
R_ 3m
Fm_ 3m
Space Group Number
166.00
6
225.00
2
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.
Not Available
Sources
Mining, Ores of Minerals
Obtained by Treating Radium with Neutrons, Ores of metals
History
Who Discovered
Ancient Chinese and Indians
Friedrich Oskar Giesel
Discovery
Before 2000 BCE
In 1902
Abundance
Abundance In Earth's Crust
0.05 %
9
Not Available
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.
- Actinium metal has a great source of alpha rays but it is hardly used outside research purpose.
Industrial Uses
Electrical Industry, Electronic Industry
NA
Medical Uses
Dentistry
NA
Other Uses
Alloys, Mirror Manufacturing, Pharmaceutical Industry
Alloys, Nuclear Research, Research Purposes
Biological Properties
Toxicity
Highly Toxic
Toxic
Present in Human Body
Yes
No
In Blood
0.01 Blood/mg dm-3
23
0.00 Blood/mg dm-3
37
In Bone
0.45 p.p.m.
19
0.00 p.p.m.
36
Physical Properties
Melting Point
Not Available
1,227.00 °C
38
Boiling Point
356.58 °C
99+
3,200.00 °C
26
Appearance
Physical State
Liquid
Solid
Color
Silver
Silvery White
Luster
NA
NA
Hardness
Speed of Sound
1,451.40 m/s
99+
Not Available
Optical Properties
Refractive Index
1.00
3
Not Available
Reflectivity
73.00 %
8
Not Available
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
Hg
Ac
Isotopes
Known Isotopes
34
5
29
10
Electronegativity
Pauling Electronegativity
2.00
7
1.10
99+
Sanderson Electronegativity
2.20
7
Not Available
Allred Rochow Electronegativity
1.44
17
1.00
36
Mulliken-Jaffe Electronegativity
1.81
9
Not Available
Allen Electronegativity
1.44
30
Not Available
Electropositivity
Pauling Electropositivity
2.00
99+
2.90
10
Ionization Energies
1st Energy Level
1,007.10 kJ/mol
4
499.00 kJ/mol
99+
2nd Energy Level
1,810.00 kJ/mol
20
1,170.00 kJ/mol
99+
3rd Energy Level
3,300.00 kJ/mol
20
1,900.00 kJ/mol
99+
4th Energy Level
Not Available
4,700.00 kJ/mol
23
Electrochemical Equivalent
3.74 g/amp-hr
10
2.82 g/amp-hr
18
Electron Work Function
4.49 eV
15
Not Available
Other Chemical Properties
Flammability, Ionization, Solubility
Ionization, Radioactive Isotopes, Radioactivity, Solubility
Atomic Properties
Atomic Number
80
36
89
29
Electron Configuration
[Xe] 4f14 5d10 6s2
[Rn] 6d1 7s2
Crystal Structure
Rhombohedral (RHO)
Face Centered Cubic (FCC)
Crystal Lattice
RHO-Crystal-Structure-of-Mercury.jpg#100
FCC-Crystal-Structure-of-Actinium.jpg#100
Atom
Number of Protons
80
36
89
29
Number of Neutrons
121
22
138
16
Number of Electrons
80
36
89
29
Radius of an Atom
Atomic Radius
151.00 pm
32
195.00 pm
7
Covalent Radius
132.00 pm
99+
Not Available
Van der Waals Radius
155.00 pm
99+
Not Available
Atomic Weight
200.59 amu
32
227.00 amu
25
Atomic Volume
14.82 cm3/mol
35
22.54 cm3/mol
11
Adjacent Atomic Numbers
Valence Electron Potential
28.20 (-eV)
99+
38.60 (-eV)
99+
Lattice Constant
300.50 pm
99+
567.00 pm
8
Lattice Angles
NA
π/2, π/2, π/2
Lattice C/A Ratio
Not Available
Not Available
Mechanical Properties
Density
Density At Room Temperature
13.53 g/cm3
24
10.00 g/cm3
37
Tensile Strength
Not Available
Not Available
Viscosity
0.00
1
Not Available
Vapor Pressure
Elasticity properties
Poisson Ratio
Not Available
Not Available
Other Mechanical Properties
NA
NA
Magnetic Properties
Magnetic Characteristics
Specific Gravity
13.53
16
10.07
28
Magnetic Ordering
Diamagnetic
Paramagnetic
Electrical Properties
Electrical Property
Conductor
Unknown
Resistivity
961.00 nΩ·m
1
Not Available
Electrical Conductivity
0.01 106/cm Ω
99+
Not Available
Electron Affinity
0.00 kJ/mol
40
Not Available
Thermal Properties
Specific Heat
0.14 J/(kg K)
38
0.12 J/(kg K)
40
Molar Heat Capacity
27.98 J/mol·K
13
27.20 J/mol·K
18
Thermal Conductivity
8.30 W/m·K
99+
12.00 W/m·K
99+
Critical Temperature
1,750.00 K
6
Not Available
Thermal Expansion
60.40 µm/(m·K)
5
Not Available
Enthalpy
Enthalpy of Vaporization
56.90 kJ/mol
99+
Not Available
Enthalpy of Fusion
2.29 kJ/mol
99+
Not Available
Enthalpy of Atomization
61.50 kJ/mol
99+
301.00 kJ/mol
36
Standard Molar Entropy
75.80 J/mol.K
6
56.50 J/mol.K
25
|
||
|
||
|
