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Manganese vs Curium

Manganese
Curium
Curium vs Manganese


Periodic Table
Symbol
Mn  
Cm  
Group Number
7  
11
Not Available  
Period Number
4  
7  
Block
d block  
f block  
Element Family
Transition Metal  
Actinide  
CAS Number
7439965  
99+
7440519  
36
Space Group Name
I_ 43m  
Not Available  
Space Group Number
217.00  
4
Not Available  
Facts
Interesting Facts
  • Manganese is an essential trace element in all forms of life.
  • Manganese metal oxidizes very easily, but it does not fuse that easily.
  
  • Curium metal does not occur free in nature.
  • Curium metal is a synthetically produced metal.
  
Sources
Found in Minerals, Mining, Ores of Minerals  
Bombarding Plutonium with Helium Ions  
History
  
  
Who Discovered
Johann Gottlieb Gahn  
Glenn T. Seaborg, Ralph A. James, Albert Ghiorso  
Discovery
In 1774  
In 1944  
Abundance
  
  
Abundance In Universe
8 * 10-4 %  
8
Not Available  
Abundance In Sun
~0.001 %  
8
~-9999 %  
Abundance In Meteorites
0.27 %  
8
Not Available  
Abundance In Earth's Crust
0.11 %  
8
Not Available  
Abundance In Oceans
0.00 %  
13
Not Available  
Abundance In Humans
0.00 %  
13
Not Available  
Uses
Uses & Benefits
  • 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.
  
  • Curium metal is used to provide power to electrical equipment for space missions.
  
Industrial Uses
Automobile Industry, Electrical Industry, Electronic Industry  
NA  
Medical Uses
NA  
NA  
Other Uses
Alloys  
Research Purposes  
Biological Properties
  
  
Toxicity
Toxic  
Unknown  
Present in Human Body
Yes  
No  
In Blood
0.08 Blood/mg dm-3  
14
0.00 Blood/mg dm-3  
37
In Bone
100.00 p.p.m.  
8
0.00 p.p.m.  
36
Physical Properties
Melting Point
1,245.00 °C  
37
1,340.00 °C  
34
Boiling Point
1,962.00 °C  
99+
3,110.00 °C  
30
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silver  
Silver  
Luster
Metallic  
Metallic  
Hardness
  
  
Mohs Hardness
6.00  
6
Not Available  
Brinell Hardness
196.00 MPa  
99+
Not Available  
Speed of Sound
5,150.00 m/s  
7
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
Mn  
Cm  
Isotopes
  
  
Known Isotopes
21  
18
15  
24
Electronegativity
  
  
Pauling Electronegativity
1.55  
25
1.30  
32
Sanderson Electronegativity
2.20  
7
Not Available  
Allred Rochow Electronegativity
1.60  
9
1.20  
27
Allen Electronegativity
1.75  
15
Not Available  
Electropositivity
  
  
Pauling Electropositivity
2.45  
29
2.70  
22
Ionization Energies
  
  
1st Energy Level
717.30 kJ/mol  
30
581.00 kJ/mol  
99+
2nd Energy Level
1,509.00 kJ/mol  
39
1,196.00 kJ/mol  
99+
3rd Energy Level
3,248.00 kJ/mol  
21
2,026.00 kJ/mol  
99+
4th Energy Level
4,940.00 kJ/mol  
20
3,550.00 kJ/mol  
99+
5th Energy Level
6,990.00 kJ/mol  
17
Not Available  
6th Energy Level
9,220.00 kJ/mol  
16
Not Available  
7th Energy level
11,500.00 kJ/mol  
16
Not Available  
8th Energy Level
18,770.00 kJ/mol  
5
Not Available  
9th Energy Level
21,400.00 kJ/mol  
6
Not Available  
10th Energy Level
23,960.00 kJ/mol  
9
Not Available  
11th Energy Level
27,590.00 kJ/mol  
10
Not Available  
12th Energy Level
30,330.00 kJ/mol  
10
Not Available  
13th Energy Level
33,150.00 kJ/mol  
11
Not Available  
14th Energy Level
38,880.00 kJ/mol  
10
Not Available  
15th Energy Level
41,987.00 kJ/mol  
13
Not Available  
16th Energy Level
109,480.00 kJ/mol  
1
Not Available  
17th Energy Level
118,100.00 kJ/mol  
2
Not Available  
18th Energy Level
127,100.00 kJ/mol  
3
Not Available  
19th Energy Level
138,600.00 kJ/mol  
4
Not Available  
20th Energy Level
148,500.00 kJ/mol  
6
Not Available  
21st Energy Level
158,600.00 kJ/mol  
6
Not Available  
22nd Energy Level
172,500.00 kJ/mol  
5
Not Available  
23rd Energy Level
181,380.00 kJ/mol  
5
Not Available  
Electrochemical Equivalent
0.29 g/amp-hr  
99+
3.07 g/amp-hr  
16
Electron Work Function
4.10 eV  
25
Not Available  
Other Chemical Properties
Ionization, Radioactive Isotopes  
Ionization, Radioactive Isotopes  
Atomic Properties
Atomic Number
25  
99+
96  
22
Electron Configuration
[Ar] 3d5 4s2  
[Rn] 5f7 6d1 7s2  
Crystal Structure
Body Centered Cubic (BCC)  
Double Hexagonal Close Packed (DHCP)  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100  
DHCP-Crystal-Structure-of-Curium.jpg#100  
Atom
  
  
Number of Protons
25  
99+
96  
22
Number of Neutrons
30  
99+
151  
10
Number of Electrons
25  
99+
96  
22
Radius of an Atom
  
  
Atomic Radius
127.00 pm  
99+
174.00 pm  
20
Covalent Radius
139.00 pm  
99+
169.00 pm  
26
Van der Waals Radius
200.00 pm  
28
200.00 pm  
28
Atomic Weight
54.94 amu  
99+
247.00 amu  
18
Atomic Volume
1.39 cm3/mol  
99+
18.28 cm3/mol  
26
Adjacent Atomic Numbers
  
  
Previous Element
Chromium
  
Americium
  
Next Element
Iron
  
Berkelium
  
Valence Electron Potential
220.00 (-eV)  
2
44.50 (-eV)  
38
Lattice Constant
891.25 pm  
1
Not Available  
Lattice Angles
π/2, π/2, π/2  
NA  
Lattice C/A Ratio
Not Available  
Not Available  
Mechanical Properties
Density
  
  
Density At Room Temperature
7.21 g/cm3  
99+
13.51 g/cm3  
25
Density When Liquid (at m.p.)
5.95 g/cm3  
99+
13.85 g/cm3  
10
Tensile Strength
Not Available  
Not Available  
Viscosity
Not Available  
Not Available  
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
12
Not Available  
Elasticity properties
  
  
Bulk Modulus
120.00 GPa  
14
Not Available  
Young's Modulus
198.00 GPa  
12
Not Available  
Poisson Ratio
Not Available  
Not Available  
Other Mechanical Properties
NA  
Unknown  
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
7.21  
99+
13.51  
17
Magnetic Ordering
Paramagnetic  
Antiferromagnetic  
Electrical Properties
  
  
Electrical Property
Conductor  
Unknown  
Resistivity
1.44 nΩ·m  
99+
1.25 nΩ·m  
99+
Electrical Conductivity
0.01 106/cm Ω  
99+
Not Available  
Electron Affinity
0.00 kJ/mol  
40
Not Available  
Thermal Properties
Specific Heat
0.48 J/(kg K)  
11
Not Available  
Molar Heat Capacity
26.32 J/mol·K  
29
Not Available  
Thermal Conductivity
7.81 W/m·K  
99+
Not Available  
Critical Temperature
Not Available  
Not Available  
Thermal Expansion
21.70 µm/(m·K)  
21
Not Available  
Enthalpy
  
  
Enthalpy of Vaporization
219.70 kJ/mol  
99+
Not Available  
Enthalpy of Fusion
14.64 kJ/mol  
23
15.00 kJ/mol  
21
Enthalpy of Atomization
280.30 kJ/mol  
38
Not Available  
Standard Molar Entropy
32.00 J/mol.K  
99+
Not Available  
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