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Tungsten vs Lead

Tungsten
Lead
Lead vs Tungsten


Periodic Table
Symbol
W   
Pb   
Group Number
6   
12
14   
4
Period Number
6   
6   
Block
d block   
p block   
Element Family
Transition Metal   
Post-​Transition   
CAS Number
7440337   
99+
7439921   
99+
Space Group Name
Im_ 3m   
Fm_ 3m   
Space Group Number
229.00   
1
225.00   
2
Facts
Interesting Facts
  • Tungsten element has the second highest melting point.
  • Pure tungsten can easily cut down with the help of hacksaw.
  
  • 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
Earth's crust, Found in Minerals, Mining, Ores of Minerals   
Earth's crust, Found in Minerals, Mining, Ores of metals, Ores of Minerals   
History
  
  
Who Discovered
Not Available   
Unknown   
Discovery
In 1781   
In Middle Easterns (7000 BCE)   
Abundance
  
  
Abundance In Universe
5 * 10-8 %   
27
1 * 10-6 %   
16
Abundance In Sun
~0.0000004 %   
23
~0.000001 %   
18
Abundance In Meteorites
0.00 %   
39
0.00 %   
23
Abundance In Earth's Crust
0.00 %   
39
0.00 %   
26
Abundance In Oceans
0.00 %   
18
0.00 %   
22
Abundance In Humans
Not Available   
0.00 %   
8
Uses
Uses & Benefits
  • Tungsten and its alloys are used in high-temperature applications like welding electrodes, high-temperature furnace, etc.
  • Tungsten carbide is very hard and used in metal working, mining and petroleum industry.
  
  • 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
Aerospace Industry, 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
Non Toxic   
Toxic   
Present in Human Body
Yes   
Yes   
In Blood
0.00 Blood/mg dm-3   
31
0.21 Blood/mg dm-3   
11
In Bone
0.00 p.p.m.   
35
30.00 p.p.m.   
10
Physical Properties
Melting Point
3,410.00 °C   
1
327.50 °C   
99+
Boiling Point
5,660.00 °C   
1
1,740.00 °C   
99+
Appearance
  
  
Physical State
Solid   
Solid   
Color
Grayish White   
Gray   
Luster
Lustrous   
Metallic   
Hardness
  
  
Mohs Hardness
7.50   
2
1.50   
18
Brinell Hardness
2,000.00 MPa   
4
38.00 MPa   
99+
Vickers Hardness
3,430.00 MPa   
1
Not Available   
Speed of Sound
4,620.00 m/s   
16
1,190.00 m/s   
99+
Optical Properties
  
  
Reflectivity
62.00 %   
13
Not Available   
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
W   
Pb   
Isotopes
  
  
Known Isotopes
33   
6
35   
4
Electronegativity
  
  
Pauling Electronegativity
2.36   
2
1.87   
13
Sanderson Electronegativity
0.98   
23
2.29   
4
Allred Rochow Electronegativity
1.40   
19
1.55   
11
Mulliken-Jaffe Electronegativity
Not Available   
2.41   
2
Allen Electronegativity
1.47   
29
1.85   
8
Electropositivity
  
  
Pauling Electropositivity
1.64   
99+
1.67   
99+
Ionization Energies
  
  
1st Energy Level
770.00 kJ/mol   
16
715.60 kJ/mol   
31
2nd Energy Level
1,700.00 kJ/mol   
29
1,450.50 kJ/mol   
99+
3rd Energy Level
Not Available   
3,081.50 kJ/mol   
23
4th Energy Level
Not Available   
4,083.00 kJ/mol   
35
5th Energy Level
Not Available   
6,640.00 kJ/mol   
20
Electrochemical Equivalent
1.14 g/amp-hr   
99+
3.87 g/amp-hr   
9
Electron Work Function
4.55 eV   
13
4.25 eV   
21
Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility   
Anti Corrosion, Ionization, Radioactive Isotopes   
Atomic Properties
Atomic Number
74   
99+
82   
34
Electron Configuration
[Xe] 4f14 5d4 6s2   
[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
74   
99+
82   
34
Number of Neutrons
110   
27
125   
19
Number of Electrons
74   
99+
82   
34
Radius of an Atom
  
  
Atomic Radius
139.00 pm   
39
175.00 pm   
19
Covalent Radius
162.00 pm   
29
146.00 pm   
38
Van der Waals Radius
200.00 pm   
28
202.00 pm   
27
Atomic Weight
183.84 amu   
37
207.20 amu   
30
Atomic Volume
9.53 cm3/mol   
99+
18.17 cm3/mol   
27
Adjacent Atomic Numbers
  
  
Previous Element
Tantalum
  
Thallium
  
Next Element
Rhenium
  
Bismuth
  
Valence Electron Potential
140.00 (-eV)   
5
24.20 (-eV)   
99+
Lattice Constant
316.52 pm   
99+
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
19.25 g/cm3   
16
11.34 g/cm3   
33
Density When Liquid (at m.p.)
17.60 g/cm3   
5
10.66 g/cm3   
15
Tensile Strength
370.00 MPa   
10
12.00 MPa   
20
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 1000 K
Not Available   
1.64 (Pa)   
7
Vapor Pressure at 2000 K
0.00 (Pa)   
32
Not Available   
Elasticity properties
  
  
Shear Modulus
161.00 GPa   
5
5.60 GPa   
99+
Bulk Modulus
310.00 GPa   
4
46.00 GPa   
24
Young's Modulus
411.00 GPa   
4
16.00 GPa   
99+
Poisson Ratio
0.28   
17
0.44   
3
Other Mechanical Properties
Ductile, Malleable   
Ductile, Malleable   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
19.22   
9
11.35   
25
Magnetic Ordering
Paramagnetic   
Diamagnetic   
Electrical Properties
  
  
Electrical Property
Superconductor   
Poor Conductor   
Resistivity
52.80 nΩ·m   
99+
208.00 nΩ·m   
16
Electrical Conductivity
0.19 106/cm Ω   
10
0.05 106/cm Ω   
36
Electron Affinity
78.60 kJ/mol   
13
35.10 kJ/mol   
28
Thermal Properties
Specific Heat
0.13 J/(kg K)   
39
0.13 J/(kg K)   
39
Molar Heat Capacity
24.27 J/mol·K   
99+
26.65 J/mol·K   
26
Thermal Conductivity
173.00 W/m·K   
7
35.30 W/m·K   
38
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
4.50 µm/(m·K)   
99+
28.90 µm/(m·K)   
13
Enthalpy
  
  
Enthalpy of Vaporization
799.10 kJ/mol   
1
179.40 kJ/mol   
99+
Enthalpy of Fusion
35.23 kJ/mol   
1
4.77 kJ/mol   
99+
Enthalpy of Atomization
837.00 kJ/mol   
1
194.60 kJ/mol   
99+
Standard Molar Entropy
32.60 J/mol.K   
99+
64.80 J/mol.K   
17
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