Manganese Lead Comparison
Periodic Table
Symbol
Mn
Pb
Group Number
7
11
14
4
Period Number
4
6
Block
d block
p block
Element Family
Transition Metal
Post-Transition
CAS Number
7439965
99+
7439921
99+
Space Group Name
I_ 43m
Fm_ 3m
Space Group Number
217.00
4
225.00
2
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.
- Galena mineral contains almost 87% of Lead metal in it, Galena is sulfide mineral.
- The best available source of Lead metal today is by recycling automobile batteries.
Sources
Found in Minerals, Mining, Ores of Minerals
Earth's crust, Found in Minerals, Mining, Ores of metals, Ores of Minerals
History
Who Discovered
Johann Gottlieb Gahn
Unknown
Discovery
In 1774
In Middle Easterns (7000 BCE)
Abundance
Abundance In Universe
8 * 10-4 %
8
1 * 10-6 %
16
Abundance In Sun
~0.001 %
8
~0.000001 %
18
Abundance In Meteorites
0.27 %
8
0.00 %
23
Abundance In Earth's Crust
0.11 %
8
0.00 %
26
Abundance In Oceans
0.00 %
13
0.00 %
22
Abundance In Humans
0.00 %
13
0.00 %
8
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 also used in insecticides, hair dyes and as an anti-knocking additive for petrol. But all these are banned by the government as Lead metal is known for detrimental to health.
Industrial Uses
Automobile Industry, Electrical Industry, Electronic Industry
Chemical Industry, Electrical Industry, Electronic Industry
Medical Uses
NA
Surgical Instruments Manufacturing
Other Uses
Alloys
Alloys
Biological Properties
Toxicity
Toxic
Toxic
Present in Human Body
Yes
Yes
In Blood
0.08 Blood/mg dm-3
14
0.21 Blood/mg dm-3
11
In Bone
100.00 p.p.m.
8
30.00 p.p.m.
10
Physical Properties
Melting Point
1,245.00 °C
37
327.50 °C
99+
Boiling Point
1,962.00 °C
99+
1,740.00 °C
99+
Appearance
Physical State
Solid
Solid
Color
Silver
Gray
Luster
Metallic
Metallic
Hardness
Mohs Hardness
6.00
6
1.50
18
Brinell Hardness
196.00 MPa
99+
38.00 MPa
99+
Speed of Sound
5,150.00 m/s
7
1,190.00 m/s
99+
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
Pb
Isotopes
Known Isotopes
21
18
35
4
Electronegativity
Pauling Electronegativity
1.55
25
1.87
13
Sanderson Electronegativity
2.20
7
2.29
4
Allred Rochow Electronegativity
1.60
9
1.55
11
Mulliken-Jaffe Electronegativity
Not Available
2.41
2
Allen Electronegativity
1.75
15
1.85
8
Electropositivity
Pauling Electropositivity
2.45
29
1.67
99+
Ionization Energies
1st Energy Level
717.30 kJ/mol
30
715.60 kJ/mol
31
2nd Energy Level
1,509.00 kJ/mol
39
1,450.50 kJ/mol
99+
3rd Energy Level
3,248.00 kJ/mol
21
3,081.50 kJ/mol
23
4th Energy Level
4,940.00 kJ/mol
20
4,083.00 kJ/mol
35
5th Energy Level
6,990.00 kJ/mol
17
6,640.00 kJ/mol
20
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+
3.87 g/amp-hr
9
Electron Work Function
4.10 eV
25
4.25 eV
21
Other Chemical Properties
Ionization, Radioactive Isotopes
Anti Corrosion, Ionization, Radioactive Isotopes
Atomic Properties
Atomic Number
25
99+
82
34
Electron Configuration
[Ar] 3d5 4s2
[Xe] 4f14 5d10 6s2 6p2
Crystal Structure
Body Centered Cubic (BCC)
Face Centered Cubic (FCC)
Crystal Lattice
BCC-Crystal-Structure-.jpg#100
FCC-Crystal-Structure-of-Lead.jpg#100
Atom
Number of Protons
25
99+
82
34
Number of Neutrons
30
99+
125
19
Number of Electrons
25
99+
82
34
Radius of an Atom
Atomic Radius
127.00 pm
99+
175.00 pm
19
Covalent Radius
139.00 pm
99+
146.00 pm
38
Van der Waals Radius
200.00 pm
28
202.00 pm
27
Atomic Weight
54.94 amu
99+
207.20 amu
30
Atomic Volume
1.39 cm3/mol
99+
18.17 cm3/mol
27
Adjacent Atomic Numbers
Valence Electron Potential
220.00 (-eV)
2
24.20 (-eV)
99+
Lattice Constant
891.25 pm
1
495.08 pm
16
Lattice Angles
π/2, π/2, π/2
π/2, π/2, π/2
Lattice C/A Ratio
Not Available
Not Available
Mechanical Properties
Density
Density At Room Temperature
7.21 g/cm3
99+
11.34 g/cm3
33
Density When Liquid (at m.p.)
5.95 g/cm3
99+
10.66 g/cm3
15
Tensile Strength
Not Available
12.00 MPa
20
Viscosity
Not Available
Not Available
Vapor Pressure
Vapor Pressure at 1000 K
0.00 (Pa)
12
1.64 (Pa)
7
Elasticity properties
Shear Modulus
Not Available
5.60 GPa
99+
Bulk Modulus
120.00 GPa
14
46.00 GPa
24
Young's Modulus
198.00 GPa
12
16.00 GPa
99+
Poisson Ratio
Not Available
0.44
3
Other Mechanical Properties
NA
Ductile, Malleable
Magnetic Properties
Magnetic Characteristics
Specific Gravity
7.21
99+
11.35
25
Magnetic Ordering
Paramagnetic
Diamagnetic
Electrical Properties
Electrical Property
Conductor
Poor Conductor
Resistivity
1.44 nΩ·m
99+
208.00 nΩ·m
16
Electrical Conductivity
0.01 106/cm Ω
99+
0.05 106/cm Ω
36
Electron Affinity
0.00 kJ/mol
40
35.10 kJ/mol
28
Thermal Properties
Specific Heat
0.48 J/(kg K)
11
0.13 J/(kg K)
39
Molar Heat Capacity
26.32 J/mol·K
29
26.65 J/mol·K
26
Thermal Conductivity
7.81 W/m·K
99+
35.30 W/m·K
38
Critical Temperature
Not Available
Not Available
Thermal Expansion
21.70 µm/(m·K)
21
28.90 µm/(m·K)
13
Enthalpy
Enthalpy of Vaporization
219.70 kJ/mol
99+
179.40 kJ/mol
99+
Enthalpy of Fusion
14.64 kJ/mol
23
4.77 kJ/mol
99+
Enthalpy of Atomization
280.30 kJ/mol
38
194.60 kJ/mol
99+
Standard Molar Entropy
32.00 J/mol.K
99+
64.80 J/mol.K
17
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