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Protactinium Silver Comparison

Protactinium
Silver
Silver Protactinium comparison


Periodic Table
Symbol
Pa  
Ag  
Group Number
3  
15
11  
7
Period Number
7  
5  
Block
f block  
d block  
Element Family
Actinide  
Transition Metal  
CAS Number
7440133  
99+
7440224  
99+
Space Group Name
I4/mmm  
Fm_ 3m  
Space Group Number
139.00  
11
225.00  
3
Facts
Interesting Facts
  • Protactinium metal has 29 isotopes.
  • Isotopes of Protactinium-231 used in nuclear weapon.
  
  • It is the most reflective element.
  • Silver is the second most ductile metal after Gold.
  • It is also used in Dentistry as a dental alloys for clips and crowning.
  
Sources
Found in Uranium Ores, Mining, Ores of metals  
Earth's crust, Found in Minerals, Ores of metals  
History
  
  
Who Discovered
William Crookes  
-  
Discovery
In 1900  
Before 5000 BC  
Abundance
  
  
Abundance In Universe
0.00 %  
17
0.00 %  
27
Abundance In Sun
0.00 %  
26
0.00 %  
26
Abundance In Meteorites
-  
0.00 %  
38
Abundance In Earth's Crust
0.00 %  
99+
0.00 %  
99+
Abundance In Oceans
0.00 %  
99+
0.00 %  
19
Abundance In Humans
0.00 %  
24
0.00 %  
24
Uses
Uses & Benefits
  • Currently known uses of Protactinium metal are limited to research purpose only.
  
  • Silver is mainly used for Jewelry and show piece.
  • It is used for manufacturing high quality mirrors due to its reflectivity property.
  
Industrial Uses
-  
Chemical Industry, Clothing Industry, Electrical Industry  
Medical Uses
-  
Dentistry, Pharmaceutical Industry  
Other Uses
-  
Alloys, Bullion, Coinage, Jewellery, Sculptures, Statues  
Biological Properties
  
  
Toxicity
Highly Toxic  
Non Toxic  
Present in Human Body
No  
Yes  
In Blood
0.00 Blood/mg dm-3  
40
0.00 Blood/mg dm-3  
29
In Bone
0.00 p.p.m.  
99+
0.44 p.p.m.  
24
Physical
Melting Point
1,568.00 °C  
21
961.93 °C  
99+
Boiling Point
4,027.00 °C  
12
2,212.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silver  
Silvery White  
Luster
Metallic  
Metallic  
Hardness
  
  
Mohs Hardness
5.00  
8
2.50  
15
Brinell Hardness
125.00 MPa  
99+
251.00 MPa  
99+
Vickers Hardness
220.00 MPa  
99+
229.00 MPa  
99+
Speed of Sound
12,400.00 m/s  
3
2,680.00 m/s  
99+
Optical Properties
  
  
Refractive Index
1.60  
33
0.16  
99+
Reflectivity
60.00 %  
23
97.00 %  
1
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Pa  
Ag  
Isotopes
  
  
Known Isotopes
27  
12
36  
3
Electronegativity
  
  
Pauling Electronegativity
1.50  
28
1.93  
10
Sanderson Electronegativity
1.50  
18
1.83  
14
Allred Rochow Electronegativity
1.14  
29
1.42  
19
Mulliken-Jaffe Electronegativity
1.50  
26
1.47  
28
Allen Electronegativity
1.50  
32
1.87  
10
Electropositivity
  
  
Pauling Electropositivity
2.50  
27
2.07  
99+
Ionization Energies
  
  
1st Energy Level
568.00 kJ/mol  
99+
731.00 kJ/mol  
27
2nd Energy Level
1,128.00 kJ/mol  
99+
2,070.00 kJ/mol  
11
3rd Energy Level
1,814.00 kJ/mol  
99+
3,361.00 kJ/mol  
19
4th Energy Level
2,991.00 kJ/mol  
99+
7,310.00 kJ/mol  
10
5th Energy Level
5,120.00 kJ/mol  
99+
7,310.00 kJ/mol  
24
6th Energy Level
5,680.00 kJ/mol  
99+
7,310.00 kJ/mol  
39
7th Energy level
5,680.00 kJ/mol  
99+
7,310.00 kJ/mol  
33
8th Energy Level
5,680.00 kJ/mol  
99+
7,310.00 kJ/mol  
31
9th Energy Level
5,120.00 kJ/mol  
99+
7,310.00 kJ/mol  
27
10th Energy Level
5,120.00 kJ/mol  
99+
7,310.00 kJ/mol  
32
11th Energy Level
5,680.00 kJ/mol  
99+
7,310.00 kJ/mol  
31
12th Energy Level
5,680.00 kJ/mol  
99+
7,310.00 kJ/mol  
99+
13th Energy Level
5,680.00 kJ/mol  
99+
7,310.00 kJ/mol  
25
14th Energy Level
5,680.00 kJ/mol  
99+
731.00 kJ/mol  
99+
15th Energy Level
56,800.00 kJ/mol  
99+
73,100.00 kJ/mol  
22
16th Energy Level
56,800.00 kJ/mol  
99+
73,100.00 kJ/mol  
17
17th Energy Level
568.50 kJ/mol  
99+
731.00 kJ/mol  
38
18th Energy Level
5,680.00 kJ/mol  
99+
7,310.00 kJ/mol  
28
19th Energy Level
568.30 kJ/mol  
99+
731.00 kJ/mol  
35
20th Energy Level
568.00 kJ/mol  
99+
731.00 kJ/mol  
29
21st Energy Level
568.00 kJ/mol  
99+
731.00 kJ/mol  
99+
22nd Energy Level
568.00 kJ/mol  
99+
731.00 kJ/mol  
23
23rd Energy Level
568.00 kJ/mol  
99+
731.00 kJ/mol  
99+
24th Energy Level
568.00 kJ/mol  
99+
731.00 kJ/mol  
22
25th Energy Level
568.00 kJ/mol  
99+
731.00 kJ/mol  
22
26th Energy Level
568.00 kJ/mol  
99+
731.00 kJ/mol  
22
27th Energy Level
568.00 kJ/mol  
99+
731.00 kJ/mol  
21
28th Energy Level
568.00 kJ/mol  
99+
731.00 kJ/mol  
27
29th Energy Level
568.00 kJ/mol  
99+
731.00 kJ/mol  
28
30th Energy Level
568.00 kJ/mol  
99+
731.00 kJ/mol  
22
Electrochemical Equivalent
1.72 g/amp-hr  
99+
4.02 g/amp-hr  
7
Electron Work Function
5.89 eV  
3
4.26 eV  
27
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity  
Chemical Stability, Ionization, Solubility  
Atomic
Atomic Number
91  
27
47  
99+
Electron Configuration
[Rn] 5f2 6d1 7s2  
[Kr] 4d10 5s1  
Crystal Structure
Tetragonal (TETR)  
Face Centered Cubic (FCC)  
Crystal Lattice
TETR-Crystal-Structure-of-Protactinium.jpg#100  
FCC-Crystal-Structure-of-Silver.jpg#100  
Atom
  
  
Number of Protons
91  
27
47  
99+
Number of Neutrons
122  
22
61  
99+
Number of Electrons
91  
27
47  
99+
Radius of an Atom
  
  
Atomic Radius
163.00 pm  
27
144.00 pm  
38
Covalent Radius
200.00 pm  
11
145.00 pm  
99+
Van der Waals Radius
243.00 pm  
15
172.00 pm  
99+
Atomic Weight
231.04 amu  
24
107.87 amu  
99+
Atomic Volume
15.00 cm3/mol  
99+
10.30 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Thorium
  
Palladium
  
Next Element
Uranium
  
Cadmium
  
Valence Electron Potential
92.00 (-eV)  
11
11.40 (-eV)  
99+
Lattice Constant
392.50 pm  
26
408.53 pm  
23
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, π/2  
Lattice C/A Ratio
1.58  
36
1.59  
26
Mechanical
Density
  
  
Density At Room Temperature
15.37 g/cm3  
20
10.49 g/cm3  
37
Density When Liquid (at m.p.)
15.37 g/cm3  
21
9.32 g/cm3  
99+
Tensile Strength
80.00 MPa  
29
170.00 MPa  
21
Viscosity
0.00  
25
0.00  
23
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
37
0.00 (Pa)  
14
Vapor Pressure at 2000 K
0.00 (Pa)  
32
0.00 (Pa)  
38
Elasticity properties
  
  
Shear Modulus
16.00 GPa  
99+
30.00 GPa  
27
Bulk Modulus
47.00 GPa  
26
100.00 GPa  
16
Young's Modulus
47.00 GPa  
99+
83.00 GPa  
25
Poisson Ratio
0.23  
30
0.37  
7
Other Mechanical Properties
-  
Ductile, Malleable  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
15.37  
23
10.50  
39
Magnetic Ordering
Paramagnetic  
Diamagnetic  
Permeability
0.00 H/m  
10
0.00 H/m  
17
Susceptibility
0.00  
21
0.00  
32
Electrical Properties
  
  
Electrical Property
Conductor  
Conductor  
Resistivity
177.00 nΩ·m  
21
15.87 nΩ·m  
99+
Electrical Conductivity
0.05 106/cm Ω  
39
0.63 106/cm Ω  
1
Electron Affinity
53.03 kJ/mol  
22
125.60 kJ/mol  
5
Thermal
Specific Heat
0.12 J/(kg K)  
99+
0.24 J/(kg K)  
25
Molar Heat Capacity
27.20 J/mol·K  
24
25.35 J/mol·K  
99+
Thermal Conductivity
47.00 W/m·K  
32
429.00 W/m·K  
1
Critical Temperature
1,841.00 K  
25
1,235.00 K  
99+
Thermal Expansion
9.90 µm/(m·K)  
99+
18.90 µm/(m·K)  
25
Enthalpy
  
  
Enthalpy of Vaporization
481.00 kJ/mol  
17
255.10 kJ/mol  
99+
Enthalpy of Fusion
12.34 kJ/mol  
34
11.30 kJ/mol  
37
Enthalpy of Atomization
481.90 kJ/mol  
19
284.50 kJ/mol  
99+
Standard Molar Entropy
198.10 J/mol.K  
1
42.60 J/mol.K  
99+
Summary >>
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Actinide Series

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