Periodic Table
Symbol
Mn
Ba
Group Number
72
0
17
👆🏻
Period Number
46
2
7
👆🏻
Block
d block
s block
Element Family
Transition Metal
Alkaline Earth
CAS Number
74399657440393
7429905
54386242
👆🏻
Space Group Name
I_ 43m
Im_ 3m
Space Group Number
217.00229.00
11
229
👆🏻
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.
- Barium oxidizes very easily in the air.
- All toxic compounds of Barium can easily dissolve in water.
- Barium carbonate is used to produce a Rat poison and its other compound Barium nitrate is used in fireworks to produce green color.
Sources
Found in Minerals, Mining, Ores of Minerals
Earth's crust, Found in Minerals, Mining, Ores of Minerals
History
Who Discovered
Johann Gottlieb Gahn
Carl Wilhelm Scheele
Discovery
In 1774
In 1772
Abundance
Abundance In Universe
0.00 %0.00 %
5E-09
0.11
👆🏻
Abundance In Sun
0.00 %0.00 %
1E-08
0.1
👆🏻
Abundance In Meteorites
0.27 %0.00 %
1.7E-07
22
👆🏻
Abundance In Earth's Crust
0.11 %0.03 %
9.9E-12
8.1
👆🏻
Abundance In Oceans
0.00 %0.00 %
2E-23
1.1
👆🏻
Abundance In Humans
0.00 %0.00 %
1E-13
1.4
👆🏻
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.
- It is sued in chemical paint manufacturing and glass manufacturing.
-
Compounds of this metal are toxic; but still the barium sulfate is insoluble and given to patients suffering from digestive disorder.
Industrial Uses
Automobile Industry, Electrical Industry, Electronic Industry
Ammunition Industry, Automobile Industry, Electrical Industry, Electronic Industry
Medical Uses
NA
NA
Other Uses
Alloys
Alloys
Biological Properties
Toxicity
Toxic
Low Toxic
Present in Human Body
✔
✘
✔
✘
In Blood
0.08 Blood/mg dm-30.07 Blood/mg dm-3
0
1970
👆🏻
In Bone
100.00 p.p.m.70.00 p.p.m.
0
170000
👆🏻
Physical
Melting Point
1,245.00 °C725.00 °C
27
3410
👆🏻
Boiling Point
1,962.00 °C1,140.00 °C
147
5660
👆🏻
Appearance
Physical State
Solid
Solid
Color
Silver
Silvery Gray
Luster
Metallic
NA
Hardness
Mohs Hardness
6.001.25
0.2
8.5
👆🏻
Brinell Hardness
196.00 MPaNA
0.14
3490
👆🏻
Vickers Hardness
NANA
121
3430
👆🏻
Speed of Sound
5,150.00 m/s1,620.00 m/s
818
16200
👆🏻
Optical Properties
Refractive Index
NANA
1.000933
1.7229
👆🏻
Reflectivity
NANA
58
97
👆🏻
Allotropes
✔
✘
✔
✘
α Allotropes
Not Available
Not Available
β Allotropes
Not Available
Not Available
γ Allotropes
Not Available
Not Available
Chemical
Chemical Formula
Mn
Ba
Isotopes
Known Isotopes
2137
0
38
👆🏻
Electronegativity
Pauling Electronegativity
1.550.89
0.7
2.54
👆🏻
Sanderson Electronegativity
2.200.68
0.22
2.56
👆🏻
Allred Rochow Electronegativity
1.600.97
0.86
1.82
👆🏻
Mulliken-Jaffe Electronegativity
NA0.88
0.62
2.48
👆🏻
Allen Electronegativity
1.750.88
0.659
2.7
👆🏻
Electropositivity
Pauling Electropositivity
2.453.11
1.46
3.3
👆🏻
Ionization Energies
1st Energy Level
717.30 kJ/mol502.90 kJ/mol
375.7
26130
👆🏻
2nd Energy Level
1,509.00 kJ/mol965.20 kJ/mol
710.2162
28750
👆🏻
3rd Energy Level
3,248.00 kJ/mol3,600.00 kJ/mol
1600
34230
👆🏻
4th Energy Level
4,940.00 kJ/molNA
2780
37066
👆🏻
5th Energy Level
6,990.00 kJ/molNA
4305.2
97510
👆🏻
6th Energy Level
9,220.00 kJ/molNA
5715.8
105800
👆🏻
7th Energy level
11,500.00 kJ/molNA
7226.8
114300
👆🏻
8th Energy Level
18,770.00 kJ/molNA
8857.4
125300
👆🏻
9th Energy Level
21,400.00 kJ/molNA
14110
134700
👆🏻
10th Energy Level
23,960.00 kJ/molNA
17100
144300
👆🏻
11th Energy Level
27,590.00 kJ/molNA
19900
169988
👆🏻
12th Energy Level
30,330.00 kJ/molNA
22219
189368
👆🏻
13th Energy Level
33,150.00 kJ/molNA
26930
76015
👆🏻
14th Energy Level
38,880.00 kJ/molNA
29196
86450
👆🏻
15th Energy Level
41,987.00 kJ/molNA
41987
97510
👆🏻
16th Energy Level
109,480.00 kJ/molNA
47206
109480
👆🏻
17th Energy Level
118,100.00 kJ/molNA
52737
122200
👆🏻
18th Energy Level
127,100.00 kJ/molNA
58570
134810
👆🏻
19th Energy Level
138,600.00 kJ/molNA
64702
148700
👆🏻
20th Energy Level
148,500.00 kJ/molNA
80400
171200
👆🏻
21st Energy Level
158,600.00 kJ/molNA
87000
179100
👆🏻
22nd Energy Level
172,500.00 kJ/molNA
93400
184900
👆🏻
23rd Energy Level
181,380.00 kJ/molNA
98420
198800
👆🏻
24th Energy Level
NANA
104400
195200
👆🏻
25th Energy Level
NANA
121900
121900
👆🏻
26th Energy Level
NANA
127700
127700
👆🏻
27th Energy Level
NANA
133800
133800
👆🏻
28th Energy Level
NANA
139800
139800
👆🏻
29th Energy Level
NANA
148100
148100
👆🏻
30th Energy Level
NANA
154500
154500
👆🏻
Electrochemical Equivalent
0.29 g/amp-hr2.56 g/amp-hr
0.16812
8.3209
👆🏻
Electron Work Function
4.10 eV2.70 eV
2.14
5.65
👆🏻
Other Chemical Properties
Ionization, Radioactive Isotopes
Ionization, Radioactive Isotopes, Radioactivity, Solubility
Atomic
Atomic Number
2556
3
117
👆🏻
Electron Configuration
[Ar] 3d5 4s2
[Xe] 6s2
Crystal Structure
Body Centered Cubic (BCC)
Body Centered Cubic (BCC)
Crystal Lattice
Atom
Number of Protons
2556
3
117
👆🏻
Number of Neutrons
3081
4
184
👆🏻
Number of Electrons
2556
3
117
👆🏻
Radius of an Atom
Atomic Radius
127.00 pm222.00 pm
112
265
👆🏻
Covalent Radius
139.00 pm215.00 pm
96
260
👆🏻
Van der Waals Radius
200.00 pm268.00 pm
139
348
👆🏻
Atomic Weight
54.94 amu137.33 amu
6.94
294
👆🏻
Atomic Volume
1.39 cm3/mol39.24 cm3/mol
1.39
71.07
👆🏻
Adjacent Atomic Numbers
Previous Element
Next Element
Valence Electron Potential
220.00 (-eV)21.30 (-eV)
8
392.42
👆🏻
Lattice Constant
891.25 pm502.80 pm
228.58
891.25
👆🏻
Lattice Angles
π/2, π/2, π/2
π/2, π/2, π/2
Lattice C/A Ratio
NANA
1.567
1.886
👆🏻
Mechanical
Density
Density At Room Temperature
7.21 g/cm33.51 g/cm3
0.534
40.7
👆🏻
Density When Liquid (at m.p.)
5.95 g/cm33.34 g/cm3
0.512
20
👆🏻
Tensile Strength
NANA
2.5
11000
👆🏻
Viscosity
NANA
0.001526
0.001526
👆🏻
Vapor Pressure
Vapor Pressure at 1000 K
0.00 (Pa)7.11 (Pa)
2.47E-11
121
👆🏻
Vapor Pressure at 2000 K
NANA
2.62E-10
774
👆🏻
Elasticity properties
Shear Modulus
NA4.90 GPa
1.3
222
👆🏻
Bulk Modulus
120.00 GPa9.60 GPa
1.6
462
👆🏻
Young's Modulus
198.00 GPa13.00 GPa
1.7
528
👆🏻
Poisson Ratio
NANA
0.032
0.47
👆🏻
Other Mechanical Properties
NA
NA
Magnetic
Magnetic Characteristics
Specific Gravity
7.213.62
0.53
4500
👆🏻
Magnetic Ordering
Paramagnetic
Paramagnetic
Permeability
NANA
1.25643E-06
0.0063
👆🏻
Susceptibility
NANA
-0.000166
200000
👆🏻
Electrical Properties
Electrical Property
Conductor
Superconductor
Resistivity
1.44 nΩ·m332.00 nΩ·m
0.18
961
👆🏻
Electrical Conductivity
0.01 106/cm Ω0.03 106/cm Ω
0.00666
0.63
👆🏻
Electron Affinity
0.00 kJ/mol13.95 kJ/mol
0
222.8
👆🏻
Thermal
Specific Heat
0.48 J/(kg K)0.20 J/(kg K)
0.11
3.6
👆🏻
Molar Heat Capacity
26.32 J/mol·K28.07 J/mol·K
16.443
62.7
👆🏻
Thermal Conductivity
7.81 W/m·K18.40 W/m·K
6.3
429
👆🏻
Critical Temperature
NANA
26.3
3223
👆🏻
Thermal Expansion
21.70 µm/(m·K)20.60 µm/(m·K)
4.5
97
👆🏻
Enthalpy
Enthalpy of Vaporization
219.70 kJ/mol140.00 kJ/mol
7.32
799.1
👆🏻
Enthalpy of Fusion
14.64 kJ/mol7.66 kJ/mol
2.1
35.23
👆🏻
Enthalpy of Atomization
280.30 kJ/mol175.70 kJ/mol
61.5
837
👆🏻
Standard Molar Entropy
32.00 J/mol.K62.50 J/mol.K
9.5
198.1
👆🏻