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Actinium vs Manganese

Actinium
Manganese
Manganese vs Actinium


Periodic Table
Symbol
Ac  
Mn  
Group Number
3  
15
7  
11
Period Number
7  
4  
Block
f block  
d block  
Element Family
Actinide  
Transition Metal  
CAS Number
7440348  
99+
7439965  
99+
Space Group Name
Fm_ 3m  
I_ 43m  
Space Group Number
225.00  
3
217.00  
5
Facts
Interesting Facts
Actinium glows in the dark due to its radioactivity.  
  • Manganese is an essential trace element in all forms of life.
  • Manganese metal oxidizes very easily, but it does not fuse that easily.
  
Sources
Obtained by Treating Radium with Neutrons, Ores of metals  
Found in Minerals, Mining, Ores of Minerals  
History
  
  
Who Discovered
Friedrich Oskar Giesel  
Johann Gottlieb Gahn  
Discovery
In 1902  
In 1774  
Abundance
  
  
Abundance In Universe
0.00 %  
34
0.00 %  
9
Abundance In Sun
0.00 %  
26
0.00 %  
8
Abundance In Meteorites
0.00 %  
99+
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
  • Actinium metal has a great source of alpha rays but it is hardly used outside research purpose.
  
  • 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, Nuclear Research, Research Purposes  
Alloys  
Biological Properties
  
  
Toxicity
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
1,227.00 °C  
38
1,245.00 °C  
37
Boiling Point
3,200.00 °C  
27
1,962.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
Silver  
Luster
-  
Metallic  
Hardness
  
  
Mohs Hardness
6.50  
5
6.00  
6
Brinell Hardness
70.00 MPa  
99+
196.00 MPa  
99+
Vickers Hardness
260.00 MPa  
99+
196.00 MPa  
99+
Speed of Sound
3,430.00 m/s  
32
5,150.00 m/s  
11
Optical Properties
  
  
Refractive Index
1.00  
99+
2.00  
15
Reflectivity
62.00 %  
21
70.00 %  
13
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Ac  
Mn  
Isotopes
  
  
Known Isotopes
29  
10
21  
18
Electronegativity
  
  
Pauling Electronegativity
1.10  
99+
1.55  
26
Sanderson Electronegativity
1.10  
38
2.20  
8
Allred Rochow Electronegativity
1.00  
37
1.60  
10
Mulliken-Jaffe Electronegativity
1.10  
99+
1.55  
23
Allen Electronegativity
1.10  
99+
1.75  
18
Electropositivity
  
  
Pauling Electropositivity
2.90  
10
2.45  
29
Ionization Energies
  
  
1st Energy Level
499.00 kJ/mol  
99+
717.30 kJ/mol  
30
2nd Energy Level
1,170.00 kJ/mol  
99+
1,509.00 kJ/mol  
40
3rd Energy Level
1,900.00 kJ/mol  
99+
3,248.00 kJ/mol  
21
4th Energy Level
4,700.00 kJ/mol  
33
4,940.00 kJ/mol  
30
5th Energy Level
4,990.00 kJ/mol  
99+
6,990.00 kJ/mol  
29
6th Energy Level
5,750.00 kJ/mol  
99+
9,220.00 kJ/mol  
22
7th Energy level
5,750.00 kJ/mol  
99+
11,500.00 kJ/mol  
16
8th Energy Level
5,750.00 kJ/mol  
99+
18,770.00 kJ/mol  
5
9th Energy Level
4,990.00 kJ/mol  
99+
21,400.00 kJ/mol  
6
10th Energy Level
4,990.00 kJ/mol  
99+
23,960.00 kJ/mol  
9
11th Energy Level
4,990.00 kJ/mol  
99+
27,590.00 kJ/mol  
10
12th Energy Level
49,900.00 kJ/mol  
21
30,330.00 kJ/mol  
32
13th Energy Level
4,990.00 kJ/mol  
99+
33,150.00 kJ/mol  
11
14th Energy Level
4,990.00 kJ/mol  
99+
38,880.00 kJ/mol  
10
15th Energy Level
49,900.00 kJ/mol  
99+
41,987.00 kJ/mol  
99+
16th Energy Level
49,900.00 kJ/mol  
99+
109,480.00 kJ/mol  
1
17th Energy Level
499.00 kJ/mol  
99+
118,100.00 kJ/mol  
2
18th Energy Level
4,990.00 kJ/mol  
99+
127,100.00 kJ/mol  
3
19th Energy Level
499.00 kJ/mol  
99+
138,600.00 kJ/mol  
4
20th Energy Level
499.00 kJ/mol  
99+
148,500.00 kJ/mol  
6
21st Energy Level
4,990.00 kJ/mol  
25
158,600.00 kJ/mol  
6
22nd Energy Level
499.00 kJ/mol  
99+
172,500.00 kJ/mol  
5
23rd Energy Level
4,990.00 kJ/mol  
29
181,380.00 kJ/mol  
5
24th Energy Level
499.00 kJ/mol  
99+
650.90 kJ/mol  
34
25th Energy Level
499.00 kJ/mol  
99+
717.30 kJ/mol  
24
26th Energy Level
499.00 kJ/mol  
99+
650.90 kJ/mol  
35
27th Energy Level
499.00 kJ/mol  
99+
650.90 kJ/mol  
36
28th Energy Level
499.00 kJ/mol  
99+
650.90 kJ/mol  
99+
29th Energy Level
499.00 kJ/mol  
99+
650.90 kJ/mol  
99+
30th Energy Level
499.00 kJ/mol  
99+
650.90 kJ/mol  
38
Electrochemical Equivalent
2.82 g/amp-hr  
22
0.29 g/amp-hr  
99+
Electron Work Function
4.38 eV  
23
4.10 eV  
32
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Ionization, Radioactive Isotopes  
Atomic
Atomic Number
89  
29
25  
99+
Electron Configuration
[Rn] 6d1 7s2  
[Ar] 3d5 4s2  
Crystal Structure
Face Centered Cubic (FCC)  
Body Centered Cubic (BCC)  
Crystal Lattice
FCC-Crystal-Structure-of-Actinium.jpg#100  
BCC-Crystal-Structure-.jpg#100  
Atom
  
  
Number of Protons
89  
29
25  
99+
Number of Neutrons
138  
17
30  
99+
Number of Electrons
89  
29
25  
99+
Radius of an Atom
  
  
Atomic Radius
195.00 pm  
9
127.00 pm  
99+
Covalent Radius
186.00 pm  
21
139.00 pm  
99+
Van der Waals Radius
215.00 pm  
31
200.00 pm  
35
Atomic Weight
227.00 amu  
25
54.94 amu  
99+
Atomic Volume
22.54 cm3/mol  
20
1.39 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Radium
  
Chromium
  
Next Element
Thorium
  
Iron
  
Valence Electron Potential
38.60 (-eV)  
99+
220.00 (-eV)  
2
Lattice Constant
567.00 pm  
9
891.25 pm  
1
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, π/2  
Lattice C/A Ratio
1.89  
2
1.55  
99+
Mechanical
Density
  
  
Density At Room Temperature
10.00 g/cm3  
40
7.21 g/cm3  
99+
Density When Liquid (at m.p.)
10.07 g/cm3  
40
5.95 g/cm3  
99+
Tensile Strength
65.00 MPa  
33
370.00 MPa  
11
Viscosity
0.00  
25
0.00  
2
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
22
0.00 (Pa)  
12
Vapor Pressure at 2000 K
0.00 (Pa)  
30
0.00 (Pa)  
30
Elasticity properties
  
  
Shear Modulus
25.00 GPa  
38
40.00 GPa  
19
Bulk Modulus
94.00 GPa  
17
120.00 GPa  
14
Young's Modulus
130.00 GPa  
16
198.00 GPa  
13
Poisson Ratio
0.34  
10
0.30  
14
Other Mechanical Properties
-  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
10.07  
99+
7.21  
99+
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Permeability
0.00 H/m  
17
0.00 H/m  
7
Susceptibility
0.00  
24
0.00  
12
Electrical Properties
  
  
Electrical Property
-  
Conductor  
Resistivity
5.20 nΩ·m  
99+
1.44 nΩ·m  
99+
Electrical Conductivity
0.15 106/cm Ω  
13
0.01 106/cm Ω  
99+
Electron Affinity
33.20 kJ/mol  
34
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
12.00 W/m·K  
99+
7.81 W/m·K  
99+
Critical Temperature
1,323.00 K  
99+
1,519.00 K  
40
Thermal Expansion
12.10 µm/(m·K)  
99+
21.70 µm/(m·K)  
22
Enthalpy
  
  
Enthalpy of Vaporization
120.00 kJ/mol  
99+
219.70 kJ/mol  
99+
Enthalpy of Fusion
14.20 kJ/mol  
28
14.64 kJ/mol  
25
Enthalpy of Atomization
301.00 kJ/mol  
99+
280.30 kJ/mol  
99+
Standard Molar Entropy
56.50 J/mol.K  
33
32.00 J/mol.K  
99+
Periodic Table >>
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