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Curium vs Uranium

Curium
Uranium
Uranium vs Curium


Periodic Table
Symbol
Cm  
U  
Group Number
Not Available  
0  
18
Period Number
7  
7  
Block
f block  
f block  
Element Family
Actinide  
Actinide  
CAS Number
7440519  
36
7440611  
28
Space Group Name
Not Available  
Cmcm  
Space Group Number
Not Available  
63.00  
10
Facts
Interesting Facts
  • Curium metal does not occur free in nature.
  • Curium metal is a synthetically produced metal.
  
  • Major mining countries of Uranium include Russia, Australia, Namibia, Canada and Niger and total 33% Uranium are mine in Kazakhstan.
  
Sources
Bombarding Plutonium with Helium Ions  
Earth's crust, Mining, Ores of Minerals  
History
  
  
Who Discovered
Glenn T. Seaborg, Ralph A. James, Albert Ghiorso  
Not Available  
Discovery
In 1944  
In 1789  
Abundance
  
  
Abundance In Universe
Not Available  
2 * 10-8 %  
29
Abundance In Sun
~-9999 %  
~0.0000001 %  
26
Abundance In Meteorites
Not Available  
0.00 %  
99+
Abundance In Earth's Crust
Not Available  
0.00 %  
36
Abundance In Oceans
Not Available  
0.00 %  
11
Uses
Uses & Benefits
  • Curium metal is used to provide power to electrical equipment for space missions.
  
  • The main use of this metal include nuclear fuel which is used to generate electricity yin nuclear power stations.
  • Synthetic elements like transuranium are made from Uranium metal.
  
Industrial Uses
NA  
Ammunition Industry, Chemical Industry  
Medical Uses
NA  
NA  
Other Uses
Research Purposes  
Alloys, Jewellery, Nuclear Reactor's Fuel, Sculptures, Statues  
Biological Properties
  
  
Toxicity
Unknown  
Toxic  
Present in Human Body
No  
No  
In Blood
0.00 Blood/mg dm-3  
37
Not Available  
In Bone
0.00 p.p.m.  
36
Not Available  
Physical Properties
Melting Point
1,340.00 °C  
34
1,132.00 °C  
39
Boiling Point
3,110.00 °C  
30
3,818.00 °C  
16
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silver  
Silvery Gray  
Luster
Metallic  
Metallic  
Hardness
  
  
Mohs Hardness
Not Available  
6.00  
6
Brinell Hardness
Not Available  
2,350.00 MPa  
2
Vickers Hardness
Not Available  
1,960.00 MPa  
2
Speed of Sound
Not Available  
3,155.00 m/s  
25
Optical Properties
  
  
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  
U  
Isotopes
  
  
Known Isotopes
15  
24
25  
14
Electronegativity
  
  
Pauling Electronegativity
1.30  
32
1.38  
28
Allred Rochow Electronegativity
1.20  
27
1.22  
26
Electropositivity
  
  
Pauling Electropositivity
2.70  
22
2.62  
26
Ionization Energies
  
  
1st Energy Level
581.00 kJ/mol  
99+
597.60 kJ/mol  
99+
2nd Energy Level
1,196.00 kJ/mol  
99+
1,420.00 kJ/mol  
99+
3rd Energy Level
2,026.00 kJ/mol  
99+
1,900.00 kJ/mol  
99+
4th Energy Level
3,550.00 kJ/mol  
99+
3,145.00 kJ/mol  
99+
Electrochemical Equivalent
3.07 g/amp-hr  
16
1.48 g/amp-hr  
99+
Electron Work Function
Not Available  
3.63 eV  
30
Other Chemical Properties
Ionization, Radioactive Isotopes  
Ionization, Radioactive Isotopes, Radioactivity  
Atomic Properties
Atomic Number
96  
22
92  
26
Electron Configuration
[Rn] 5f7 6d1 7s2  
[Rn] 5f3 6d1 7s2  
Crystal Structure
Double Hexagonal Close Packed (DHCP)  
Orthorhombic (ORTH)  
Crystal Lattice
DHCP-Crystal-Structure-of-Curium.jpg#100  
ORTH-Crystal-Structure-of-Uranium.jpg#100  
Atom
  
  
Number of Protons
96  
22
92  
26
Number of Neutrons
151  
10
146  
13
Number of Electrons
96  
22
92  
26
Radius of an Atom
  
  
Atomic Radius
174.00 pm  
20
156.00 pm  
29
Covalent Radius
169.00 pm  
26
196.00 pm  
14
Van der Waals Radius
200.00 pm  
28
186.00 pm  
33
Atomic Weight
247.00 amu  
18
238.03 amu  
21
Atomic Volume
18.28 cm3/mol  
26
12.59 cm3/mol  
40
Adjacent Atomic Numbers
  
  
Previous Element
Americium
  
Protactinium
  
Next Element
Berkelium
  
Neptunium
  
Valence Electron Potential
44.50 (-eV)  
38
170.00 (-eV)  
4
Lattice Constant
Not Available  
295.08 pm  
99+
Lattice Angles
NA  
π/2, π/2, π/2  
Lattice C/A Ratio
Not Available  
Not Available  
Mechanical Properties
Density
  
  
Density At Room Temperature
13.51 g/cm3  
25
19.10 g/cm3  
17
Density When Liquid (at m.p.)
13.85 g/cm3  
10
17.30 g/cm3  
7
Tensile Strength
Not Available  
Not Available  
Viscosity
Not Available  
Not Available  
Vapor Pressure
  
  
Vapor Pressure at 2000 K
Not Available  
0.01 (Pa)  
20
Elasticity properties
  
  
Shear Modulus
Not Available  
111.00 GPa  
10
Bulk Modulus
Not Available  
100.00 GPa  
16
Young's Modulus
Not Available  
208.00 GPa  
10
Poisson Ratio
Not Available  
0.23  
30
Other Mechanical Properties
Unknown  
Ductile, Malleable  
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
13.51  
17
18.80  
10
Magnetic Ordering
Antiferromagnetic  
Paramagnetic  
Electrical Properties
  
  
Electrical Property
Unknown  
Poor Conductor  
Resistivity
1.25 nΩ·m  
99+
0.28 nΩ·m  
99+
Electrical Conductivity
Not Available  
0.04 106/cm Ω  
37
Thermal Properties
Specific Heat
Not Available  
0.12 J/(kg K)  
40
Molar Heat Capacity
Not Available  
27.67 J/mol·K  
15
Thermal Conductivity
Not Available  
27.50 W/m·K  
40
Critical Temperature
Not Available  
Not Available  
Thermal Expansion
Not Available  
13.90 µm/(m·K)  
27
Enthalpy
  
  
Enthalpy of Vaporization
Not Available  
477.00 kJ/mol  
13
Enthalpy of Fusion
15.00 kJ/mol  
21
15.48 kJ/mol  
19
Enthalpy of Atomization
Not Available  
489.50 kJ/mol  
14
Standard Molar Entropy
Not Available  
50.20 J/mol.K  
31
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