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Uranium Protactinium Comparison

Uranium
Protactinium
Protactinium Uranium comparison


Periodic Table
Symbol
U   
Pa   
Group Number
0   
18
Not Available   
Period Number
7   
7   
Block
f block   
f block   
Element Family
Actinide   
Actinide   
CAS Number
7440611   
28
7440133   
99+
Space Group Name
Cmcm   
I4/mmm   
Space Group Number
63.00   
10
139.00   
8
Facts
Interesting Facts
  • Major mining countries of Uranium include Russia, Australia, Namibia, Canada and Niger and total 33% Uranium are mine in Kazakhstan.
  
  • Protactinium metal has 29 isotopes.
  • Isotopes of Protactinium-231 used in nuclear weapon.
  
Sources
Earth's crust, Mining, Ores of Minerals   
Found in Uranium Ores, Mining, Ores of metals   
History
  
  
Who Discovered
Not Available   
William Crookes   
Discovery
In 1789   
In 1900   
Abundance
  
  
Abundance In Universe
2 * 10-8 %   
29
Not Available   
Abundance In Sun
~0.0000001 %   
26
~-9999 %   
Abundance In Meteorites
0.00 %   
99+
Not Available   
Abundance In Earth's Crust
0.00 %   
36
0.00 %   
99+
Abundance In Oceans
0.00 %   
11
0.00 %   
99+
Uses
Uses & Benefits
  • 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.
  
  • Currently known uses of Protactinium metal are limited to research purpose only.
  
Industrial Uses
Ammunition Industry, Chemical Industry   
NA   
Medical Uses
NA   
NA   
Other Uses
Alloys, Jewellery, Nuclear Reactor's Fuel, Sculptures, Statues   
NA   
Biological Properties
  
  
Toxicity
Toxic   
Highly Toxic   
Present in Human Body
No   
No   
In Blood
Not Available   
0.00 Blood/mg dm-3   
37
In Bone
Not Available   
0.00 p.p.m.   
36
Physical Properties
Melting Point
1,132.00 °C   
39
1,568.00 °C   
21
Boiling Point
3,818.00 °C   
16
4,027.00 °C   
12
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silvery Gray   
Silver   
Luster
Metallic   
Metallic   
Hardness
  
  
Mohs Hardness
6.00   
6
Not Available   
Brinell Hardness
2,350.00 MPa   
2
Not Available   
Vickers Hardness
1,960.00 MPa   
2
Not Available   
Speed of Sound
3,155.00 m/s   
25
Not Available   
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
U   
Pa   
Isotopes
  
  
Known Isotopes
25   
14
27   
12
Electronegativity
  
  
Pauling Electronegativity
1.38   
28
1.50   
27
Allred Rochow Electronegativity
1.22   
26
1.14   
28
Electropositivity
  
  
Pauling Electropositivity
2.62   
26
2.50   
27
Ionization Energies
  
  
1st Energy Level
597.60 kJ/mol   
99+
568.00 kJ/mol   
99+
2nd Energy Level
1,420.00 kJ/mol   
99+
1,128.00 kJ/mol   
99+
3rd Energy Level
1,900.00 kJ/mol   
99+
1,814.00 kJ/mol   
99+
4th Energy Level
3,145.00 kJ/mol   
99+
2,991.00 kJ/mol   
99+
Electrochemical Equivalent
1.48 g/amp-hr   
99+
1.72 g/amp-hr   
99+
Electron Work Function
3.63 eV   
30
Not Available   
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity   
Ionization, Radioactive Isotopes, Radioactivity   
Atomic Properties
Atomic Number
92   
26
91   
27
Electron Configuration
[Rn] 5f3 6d1 7s2   
[Rn] 5f2 6d1 7s2   
Crystal Structure
Orthorhombic (ORTH)   
Tetragonal (TETR)   
Crystal Lattice
ORTH-Crystal-Structure-of-Uranium.jpg#100   
TETR-Crystal-Structure-of-Protactinium.jpg#100   
Atom
  
  
Number of Protons
92   
26
91   
27
Number of Neutrons
146   
13
122   
21
Number of Electrons
92   
26
91   
27
Radius of an Atom
  
  
Atomic Radius
156.00 pm   
29
163.00 pm   
25
Covalent Radius
196.00 pm   
14
200.00 pm   
11
Van der Waals Radius
186.00 pm   
33
243.00 pm   
11
Atomic Weight
238.03 amu   
21
231.04 amu   
24
Atomic Volume
12.59 cm3/mol   
40
15.00 cm3/mol   
34
Adjacent Atomic Numbers
  
  
Previous Element
Protactinium
  
Thorium
  
Next Element
Neptunium
  
Uranium
  
Valence Electron Potential
170.00 (-eV)   
4
92.00 (-eV)   
11
Lattice Constant
295.08 pm   
99+
392.50 pm   
23
Lattice Angles
π/2, π/2, π/2   
π/2, π/2, π/2   
Lattice C/A Ratio
Not Available   
Not Available   
Mechanical Properties
Density
  
  
Density At Room Temperature
19.10 g/cm3   
17
15.37 g/cm3   
20
Density When Liquid (at m.p.)
17.30 g/cm3   
7
Not Available   
Tensile Strength
Not Available   
Not Available   
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 2000 K
0.01 (Pa)   
20
Not Available   
Elasticity properties
  
  
Shear Modulus
111.00 GPa   
10
Not Available   
Bulk Modulus
100.00 GPa   
16
Not Available   
Young's Modulus
208.00 GPa   
10
Not Available   
Poisson Ratio
0.23   
30
Not Available   
Other Mechanical Properties
Ductile, Malleable   
Unknown   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
18.80   
10
15.37   
12
Magnetic Ordering
Paramagnetic   
Paramagnetic   
Electrical Properties
  
  
Electrical Property
Poor Conductor   
Conductor   
Resistivity
0.28 nΩ·m   
99+
177.00 nΩ·m   
21
Electrical Conductivity
0.04 106/cm Ω   
37
0.05 106/cm Ω   
34
Thermal Properties
Specific Heat
0.12 J/(kg K)   
40
0.12 J/(kg K)   
40
Molar Heat Capacity
27.67 J/mol·K   
15
Not Available   
Thermal Conductivity
27.50 W/m·K   
40
47.00 W/m·K   
32
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
13.90 µm/(m·K)   
27
9.90 µm/(m·K)   
40
Enthalpy
  
  
Enthalpy of Vaporization
477.00 kJ/mol   
13
Not Available   
Enthalpy of Fusion
15.48 kJ/mol   
19
12.34 kJ/mol   
28
Enthalpy of Atomization
489.50 kJ/mol   
14
Not Available   
Standard Molar Entropy
50.20 J/mol.K   
31
198.10 J/mol.K   
1
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