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Protactinium vs Manganese

Protactinium
Manganese
Manganese vs Protactinium


Periodic Table
Symbol
Pa  
Mn  
Group Number
3  
15
7  
11
Period Number
7  
4  
Block
f block  
d block  
Element Family
Actinide  
Transition Metal  
CAS Number
7440133  
99+
7439965  
99+
Space Group Name
I4/mmm  
I_ 43m  
Space Group Number
139.00  
11
217.00  
5
Facts
Interesting Facts
  • Protactinium metal has 29 isotopes.
  • Isotopes of Protactinium-231 used in nuclear weapon.
  
  • Manganese is an essential trace element in all forms of life.
  • Manganese metal oxidizes very easily, but it does not fuse that easily.
  
Sources
Found in Uranium Ores, Mining, Ores of metals  
Found in Minerals, Mining, Ores of Minerals  
History
  
  
Who Discovered
William Crookes  
Johann Gottlieb Gahn  
Discovery
In 1900  
In 1774  
Abundance
  
  
Abundance In Universe
0.00 %  
17
0.00 %  
9
Abundance In Sun
0.00 %  
26
0.00 %  
8
Abundance In Meteorites
-  
0.27 %  
8
Abundance In Earth's Crust
0.00 %  
99+
0.11 %  
8
Abundance In Oceans
0.00 %  
99+
0.00 %  
13
Abundance In Humans
0.00 %  
24
0.00 %  
15
Uses
Uses & Benefits
  • Currently known uses of Protactinium metal are limited to research purpose only.
  
  • This metal is very brittle hence it mostly not used as a pure metal, but its alloys are very useful
  • Its alloy Manganese steel is extremely strong and used in railway tracks, safes, prison bars and riffle barrels.
  
Industrial Uses
-  
Automobile Industry, Electrical Industry, Electronic Industry  
Medical Uses
-  
-  
Other Uses
-  
Alloys  
Biological Properties
  
  
Toxicity
Highly Toxic  
Toxic  
Present in Human Body
No  
Yes  
In Blood
0.00 Blood/mg dm-3  
40
0.08 Blood/mg dm-3  
14
In Bone
0.00 p.p.m.  
99+
100.00 p.p.m.  
8
Physical
Melting Point
1,568.00 °C  
21
1,245.00 °C  
37
Boiling Point
4,027.00 °C  
12
1,962.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silver  
Silver  
Luster
Metallic  
Metallic  
Hardness
  
  
Mohs Hardness
5.00  
8
6.00  
6
Brinell Hardness
125.00 MPa  
99+
196.00 MPa  
99+
Vickers Hardness
220.00 MPa  
99+
196.00 MPa  
99+
Speed of Sound
12,400.00 m/s  
3
5,150.00 m/s  
11
Optical Properties
  
  
Refractive Index
1.60  
33
2.00  
15
Reflectivity
60.00 %  
23
70.00 %  
13
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Pa  
Mn  
Isotopes
  
  
Known Isotopes
27  
12
21  
18
Electronegativity
  
  
Pauling Electronegativity
1.50  
28
1.55  
26
Sanderson Electronegativity
1.50  
18
2.20  
8
Allred Rochow Electronegativity
1.14  
29
1.60  
10
Mulliken-Jaffe Electronegativity
1.50  
26
1.55  
23
Allen Electronegativity
1.50  
32
1.75  
18
Electropositivity
  
  
Pauling Electropositivity
2.50  
27
2.45  
29
Ionization Energies
  
  
1st Energy Level
568.00 kJ/mol  
99+
717.30 kJ/mol  
30
2nd Energy Level
1,128.00 kJ/mol  
99+
1,509.00 kJ/mol  
40
3rd Energy Level
1,814.00 kJ/mol  
99+
3,248.00 kJ/mol  
21
4th Energy Level
2,991.00 kJ/mol  
99+
4,940.00 kJ/mol  
30
5th Energy Level
5,120.00 kJ/mol  
99+
6,990.00 kJ/mol  
29
6th Energy Level
5,680.00 kJ/mol  
99+
9,220.00 kJ/mol  
22
7th Energy level
5,680.00 kJ/mol  
99+
11,500.00 kJ/mol  
16
8th Energy Level
5,680.00 kJ/mol  
99+
18,770.00 kJ/mol  
5
9th Energy Level
5,120.00 kJ/mol  
99+
21,400.00 kJ/mol  
6
10th Energy Level
5,120.00 kJ/mol  
99+
23,960.00 kJ/mol  
9
11th Energy Level
5,680.00 kJ/mol  
99+
27,590.00 kJ/mol  
10
12th Energy Level
5,680.00 kJ/mol  
99+
30,330.00 kJ/mol  
32
13th Energy Level
5,680.00 kJ/mol  
99+
33,150.00 kJ/mol  
11
14th Energy Level
5,680.00 kJ/mol  
99+
38,880.00 kJ/mol  
10
15th Energy Level
56,800.00 kJ/mol  
99+
41,987.00 kJ/mol  
99+
16th Energy Level
56,800.00 kJ/mol  
99+
109,480.00 kJ/mol  
1
17th Energy Level
568.50 kJ/mol  
99+
118,100.00 kJ/mol  
2
18th Energy Level
5,680.00 kJ/mol  
99+
127,100.00 kJ/mol  
3
19th Energy Level
568.30 kJ/mol  
99+
138,600.00 kJ/mol  
4
20th Energy Level
568.00 kJ/mol  
99+
148,500.00 kJ/mol  
6
21st Energy Level
568.00 kJ/mol  
99+
158,600.00 kJ/mol  
6
22nd Energy Level
568.00 kJ/mol  
99+
172,500.00 kJ/mol  
5
23rd Energy Level
568.00 kJ/mol  
99+
181,380.00 kJ/mol  
5
24th Energy Level
568.00 kJ/mol  
99+
650.90 kJ/mol  
34
25th Energy Level
568.00 kJ/mol  
99+
717.30 kJ/mol  
24
26th Energy Level
568.00 kJ/mol  
99+
650.90 kJ/mol  
35
27th Energy Level
568.00 kJ/mol  
99+
650.90 kJ/mol  
36
28th Energy Level
568.00 kJ/mol  
99+
650.90 kJ/mol  
99+
29th Energy Level
568.00 kJ/mol  
99+
650.90 kJ/mol  
99+
30th Energy Level
568.00 kJ/mol  
99+
650.90 kJ/mol  
38
Electrochemical Equivalent
1.72 g/amp-hr  
99+
0.29 g/amp-hr  
99+
Electron Work Function
5.89 eV  
3
4.10 eV  
32
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity  
Ionization, Radioactive Isotopes  
Atomic
Atomic Number
91  
27
25  
99+
Electron Configuration
[Rn] 5f2 6d1 7s2  
[Ar] 3d5 4s2  
Crystal Structure
Tetragonal (TETR)  
Body Centered Cubic (BCC)  
Crystal Lattice
TETR-Crystal-Structure-of-Protactinium.jpg#100  
BCC-Crystal-Structure-.jpg#100  
Atom
  
  
Number of Protons
91  
27
25  
99+
Number of Neutrons
122  
22
30  
99+
Number of Electrons
91  
27
25  
99+
Radius of an Atom
  
  
Atomic Radius
163.00 pm  
27
127.00 pm  
99+
Covalent Radius
200.00 pm  
11
139.00 pm  
99+
Van der Waals Radius
243.00 pm  
15
200.00 pm  
35
Atomic Weight
231.04 amu  
24
54.94 amu  
99+
Atomic Volume
15.00 cm3/mol  
99+
1.39 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Thorium
  
Chromium
  
Next Element
Uranium
  
Iron
  
Valence Electron Potential
92.00 (-eV)  
11
220.00 (-eV)  
2
Lattice Constant
392.50 pm  
26
891.25 pm  
1
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, π/2  
Lattice C/A Ratio
1.58  
36
1.55  
99+
Mechanical
Density
  
  
Density At Room Temperature
15.37 g/cm3  
20
7.21 g/cm3  
99+
Density When Liquid (at m.p.)
15.37 g/cm3  
21
5.95 g/cm3  
99+
Tensile Strength
80.00 MPa  
29
370.00 MPa  
11
Viscosity
0.00  
25
0.00  
2
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
37
0.00 (Pa)  
12
Vapor Pressure at 2000 K
0.00 (Pa)  
32
0.00 (Pa)  
30
Elasticity properties
  
  
Shear Modulus
16.00 GPa  
99+
40.00 GPa  
19
Bulk Modulus
47.00 GPa  
26
120.00 GPa  
14
Young's Modulus
47.00 GPa  
99+
198.00 GPa  
13
Poisson Ratio
0.23  
30
0.30  
14
Other Mechanical Properties
-  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
15.37  
23
7.21  
99+
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Permeability
0.00 H/m  
10
0.00 H/m  
7
Susceptibility
0.00  
21
0.00  
12
Electrical Properties
  
  
Electrical Property
Conductor  
Conductor  
Resistivity
177.00 nΩ·m  
21
1.44 nΩ·m  
99+
Electrical Conductivity
0.05 106/cm Ω  
39
0.01 106/cm Ω  
99+
Electron Affinity
53.03 kJ/mol  
22
0.00 kJ/mol  
99+
Thermal
Specific Heat
0.12 J/(kg K)  
99+
0.48 J/(kg K)  
11
Molar Heat Capacity
27.20 J/mol·K  
24
26.32 J/mol·K  
37
Thermal Conductivity
47.00 W/m·K  
32
7.81 W/m·K  
99+
Critical Temperature
1,841.00 K  
25
1,519.00 K  
40
Thermal Expansion
9.90 µm/(m·K)  
99+
21.70 µm/(m·K)  
22
Enthalpy
  
  
Enthalpy of Vaporization
481.00 kJ/mol  
17
219.70 kJ/mol  
99+
Enthalpy of Fusion
12.34 kJ/mol  
34
14.64 kJ/mol  
25
Enthalpy of Atomization
481.90 kJ/mol  
19
280.30 kJ/mol  
99+
Standard Molar Entropy
198.10 J/mol.K  
1
32.00 J/mol.K  
99+
Periodic Table >>
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