Curium Mercury Comparison
Periodic Table
Symbol
Cm
Hg
Group Number
Not Available
12
6
Period Number
7
6
Block
f block
d block
Element Family
Actinide
Transition Metal
CAS Number
7440519
36
7439976
99+
Space Group Name
Not Available
R_ 3m
Space Group Number
Not Available
166.00
6
Facts
Interesting Facts
- Curium metal does not occur free in nature.
- Curium metal is a synthetically produced metal.
- 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
Bombarding Plutonium with Helium Ions
Mining, Ores of Minerals
History
Who Discovered
Glenn T. Seaborg, Ralph A. James, Albert Ghiorso
Ancient Chinese and Indians
Discovery
In 1944
Before 2000 BCE
Abundance
Abundance In Earth's Crust
Not Available
0.05 %
9
Uses
Uses & Benefits
- Curium metal is used to provide power to electrical equipment for space missions.
- 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
Research Purposes
Alloys, Mirror Manufacturing, Pharmaceutical Industry
Biological Properties
Toxicity
Unknown
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
1,340.00 °C
34
Not Available
Boiling Point
3,110.00 °C
30
356.58 °C
99+
Appearance
Physical State
Solid
Liquid
Color
Silver
Silver
Luster
Metallic
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
Cm
Hg
Isotopes
Known Isotopes
15
24
34
5
Electronegativity
Pauling Electronegativity
1.30
32
2.00
7
Sanderson Electronegativity
Not Available
2.20
7
Allred Rochow Electronegativity
1.20
27
1.44
17
Mulliken-Jaffe Electronegativity
Not Available
1.81
9
Allen Electronegativity
Not Available
1.44
30
Electropositivity
Pauling Electropositivity
2.70
22
2.00
99+
Ionization Energies
1st Energy Level
581.00 kJ/mol
99+
1,007.10 kJ/mol
4
2nd Energy Level
1,196.00 kJ/mol
99+
1,810.00 kJ/mol
20
3rd Energy Level
2,026.00 kJ/mol
99+
3,300.00 kJ/mol
20
4th Energy Level
3,550.00 kJ/mol
99+
Not Available
Electrochemical Equivalent
3.07 g/amp-hr
16
3.74 g/amp-hr
10
Electron Work Function
Not Available
4.49 eV
15
Other Chemical Properties
Ionization, Radioactive Isotopes
Flammability, Ionization, Solubility
Atomic Properties
Atomic Number
96
22
80
36
Electron Configuration
[Rn] 5f7 6d1 7s2
[Xe] 4f14 5d10 6s2
Crystal Structure
Double Hexagonal Close Packed (DHCP)
Rhombohedral (RHO)
Crystal Lattice
DHCP-Crystal-Structure-of-Curium.jpg#100
RHO-Crystal-Structure-of-Mercury.jpg#100
Atom
Number of Protons
96
22
80
36
Number of Neutrons
151
10
121
22
Number of Electrons
96
22
80
36
Radius of an Atom
Atomic Radius
174.00 pm
20
151.00 pm
32
Covalent Radius
169.00 pm
26
132.00 pm
99+
Van der Waals Radius
200.00 pm
28
155.00 pm
99+
Atomic Weight
247.00 amu
18
200.59 amu
32
Atomic Volume
18.28 cm3/mol
26
14.82 cm3/mol
35
Adjacent Atomic Numbers
Valence Electron Potential
44.50 (-eV)
38
28.20 (-eV)
99+
Lattice Constant
Not Available
300.50 pm
99+
Lattice Angles
NA
NA
Lattice C/A Ratio
Not Available
Not Available
Mechanical Properties
Density
Density At Room Temperature
13.51 g/cm3
25
13.53 g/cm3
24
Density When Liquid (at m.p.)
13.85 g/cm3
10
Not Available
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
Unknown
NA
Magnetic Properties
Magnetic Characteristics
Specific Gravity
13.51
17
13.53
16
Magnetic Ordering
Antiferromagnetic
Diamagnetic
Electrical Properties
Electrical Property
Unknown
Conductor
Resistivity
1.25 nΩ·m
99+
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
Not Available
0.14 J/(kg K)
38
Molar Heat Capacity
Not Available
27.98 J/mol·K
13
Thermal Conductivity
Not Available
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
15.00 kJ/mol
21
2.29 kJ/mol
99+
Enthalpy of Atomization
Not Available
61.50 kJ/mol
99+
Standard Molar Entropy
Not Available
75.80 J/mol.K
6
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