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Zinc Lead Comparison


Lead Zinc comparison


Periodic Table

Symbol
Zn   
Pb   

Group Number
12   
6
14   
4

Period Number
4   
6   

Block
d block   
p block   

Element Family
Transition Metal   
Post-​Transition   

CAS Number
7440666   
24
7439921   
99+

Space Group Name
P63/mmc   
Fm_ 3m   

Space Group Number
194.00   
5
225.00   
2

Facts

Interesting Facts
  • Zinc metal found (obtain) in many forms like granules, foil, dust and in a powder form.
  • The leading producers of Zinc metal are Australia, Canada, China, U.S.A and Peru.
  
  • 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
Indian metallurgists   
Unknown   

Discovery
Before 1000 BCE   
In Middle Easterns (7000 BCE)   

Abundance
  
  

Abundance In Universe
3 * 10-5 %   
11
1 * 10-6 %   
16

Abundance In Sun
~0.0002 %   
10
~0.000001 %   
18

Abundance In Meteorites
0.02 %   
12
0.00 %   
23

Abundance In Earth's Crust
0.01 %   
16
0.00 %   
26

Abundance In Oceans
0.00 %   
10
0.00 %   
22

Abundance In Humans
0.00 %   
6
0.00 %   
8

Uses

Uses & Benefits
  • It is mainly used for Galvanizing other metals.
  • It is also used for manufacturing die-casting and it is very essential for automobile 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
Electrical Industry, Electronic Industry   
Chemical Industry, Electrical Industry, Electronic Industry   

Medical Uses
Pharmaceutical Industry   
Surgical Instruments Manufacturing   

Other Uses
Alloys   
Alloys   

Biological Properties
  
  

Toxicity
Highly Toxic   
Toxic   

Present in Human Body
Yes   
Yes   

In Blood
7.00 Blood/mg dm-3   
6
0.21 Blood/mg dm-3   
11

In Bone
170.00 p.p.m.   
6
30.00 p.p.m.   
10

Physical Properties

Melting Point
419.58 °C   
99+
327.50 °C   
99+

Boiling Point
907.00 °C   
99+
1,740.00 °C   
99+

Appearance
  
  

Physical State
Solid   
Solid   

Color
Silvery Gray   
Gray   

Luster
Metallic   
Metallic   

Hardness
  
  

Mohs Hardness
2.50   
14
1.50   
18

Brinell Hardness
327.00 MPa   
32
38.00 MPa   
99+

Speed of Sound
3,850.00 m/s   
18
1,190.00 m/s   
99+

Optical Properties
  
  

Refractive Index
1.00   
2
Not Available   

Reflectivity
80.00 %   
5
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
Zn   
Pb   

Isotopes
  
  

Known Isotopes
25   
14
35   
4

Electronegativity
  
  

Pauling Electronegativity
1.65   
19
1.87   
13

Sanderson Electronegativity
2.23   
6
2.29   
4

Allred Rochow Electronegativity
1.66   
7
1.55   
11

Mulliken-Jaffe Electronegativity
1.65   
11
2.41   
2

Allen Electronegativity
1.59   
22
1.85   
8

Electropositivity
  
  

Pauling Electropositivity
2.35   
35
1.67   
99+

Ionization Energies
  
  

1st Energy Level
906.40 kJ/mol   
6
715.60 kJ/mol   
31

2nd Energy Level
1,733.30 kJ/mol   
27
1,450.50 kJ/mol   
99+

3rd Energy Level
3,833.00 kJ/mol   
12
3,081.50 kJ/mol   
23

4th Energy Level
5,731.00 kJ/mol   
11
4,083.00 kJ/mol   
35

5th Energy Level
7,970.00 kJ/mol   
9
6,640.00 kJ/mol   
20

6th Energy Level
10,400.00 kJ/mol   
9
Not Available   

7th Energy level
12,900.00 kJ/mol   
9
Not Available   

8th Energy Level
16,800.00 kJ/mol   
6
Not Available   

9th Energy Level
19,600.00 kJ/mol   
8
Not Available   

10th Energy Level
23,000.00 kJ/mol   
10
Not Available   

11th Energy Level
26,400.00 kJ/mol   
11
Not Available   

12th Energy Level
29,990.00 kJ/mol   
11
Not Available   

13th Energy Level
40,490.00 kJ/mol   
5
Not Available   

14th Energy Level
43,800.00 kJ/mol   
6
Not Available   

15th Energy Level
47,300.00 kJ/mol   
8
Not Available   

16th Energy Level
52,300.00 kJ/mol   
9
Not Available   

17th Energy Level
55,900.00 kJ/mol   
10
Not Available   

18th Energy Level
59,700.00 kJ/mol   
11
Not Available   

19th Energy Level
67,300.00 kJ/mol   
10
Not Available   

20th Energy Level
171,200.00 kJ/mol   
1
Not Available   

21st Energy Level
179,100.00 kJ/mol   
1
Not Available   

Electrochemical Equivalent
1.22 g/amp-hr   
99+
3.87 g/amp-hr   
9

Electron Work Function
4.33 eV   
17
4.25 eV   
21

Other Chemical Properties
Anti Corrosion, Chemical Stability, Ionization, Radioactive Isotopes   
Anti Corrosion, Ionization, Radioactive Isotopes   

Atomic Properties

Atomic Number
30   
99+
82   
34

Electron Configuration
[Ar] 3d10 4s2   
[Xe] 4f14 5d10 6s2 6p2   

Crystal Structure
Hexagonal Close Packed (HCP)   
Face Centered Cubic (FCC)   

Crystal Lattice
HCP-Crystal-Structure-of-Zinc.jpg#100   
FCC-Crystal-Structure-of-Lead.jpg#100   

Atom
  
  

Number of Protons
30   
99+
82   
34

Number of Neutrons
35   
99+
125   
19

Number of Electrons
30   
99+
82   
34

Radius of an Atom
  
  

Atomic Radius
134.00 pm   
99+
175.00 pm   
19

Covalent Radius
122.00 pm   
99+
146.00 pm   
38

Van der Waals Radius
139.00 pm   
99+
202.00 pm   
27

Atomic Weight
65.38 amu   
99+
207.20 amu   
30

Atomic Volume
9.20 cm3/mol   
99+
18.17 cm3/mol   
27

Adjacent Atomic Numbers
  
  

Previous Element
Copper
  
Thallium
  

Next Element
Gallium
  
Bismuth
  

Valence Electron Potential
38.90 (-eV)   
99+
24.20 (-eV)   
99+

Lattice Constant
266.49 pm   
99+
495.08 pm   
16

Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, π/2   

Lattice C/A Ratio
Not Available   
Not Available   

Mechanical Properties

Density
  
  

Density At Room Temperature
7.14 g/cm3   
99+
11.34 g/cm3   
33

Density When Liquid (at m.p.)
6.57 g/cm3   
37
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
Not Available   
1.64 (Pa)   
7

Elasticity properties
  
  

Shear Modulus
43.00 GPa   
18
5.60 GPa   
99+

Bulk Modulus
70.00 GPa   
19
46.00 GPa   
24

Young's Modulus
108.00 GPa   
19
16.00 GPa   
99+

Poisson Ratio
0.25   
24
0.44   
3

Other Mechanical Properties
NA   
Ductile, Malleable   

Magnetic Properties

Magnetic Characteristics
  
  

Specific Gravity
6.90   
99+
11.35   
25

Magnetic Ordering
Diamagnetic   
Diamagnetic   

Electrical Properties
  
  

Electrical Property
Conductor   
Poor Conductor   

Resistivity
59.00 nΩ·m   
40
208.00 nΩ·m   
16

Electrical Conductivity
0.17 106/cm Ω   
12
0.05 106/cm Ω   
36

Electron Affinity
0.00 kJ/mol   
40
35.10 kJ/mol   
28

Thermal Properties

Specific Heat
0.39 J/(kg K)   
14
0.13 J/(kg K)   
39

Molar Heat Capacity
25.47 J/mol·K   
39
26.65 J/mol·K   
26

Thermal Conductivity
116.00 W/m·K   
14
35.30 W/m·K   
38

Critical Temperature
Not Available   
Not Available   

Thermal Expansion
30.20 µm/(m·K)   
11
28.90 µm/(m·K)   
13

Enthalpy
  
  

Enthalpy of Vaporization
7.32 kJ/mol   
99+
179.40 kJ/mol   
99+

Enthalpy of Fusion
7.32 kJ/mol   
99+
4.77 kJ/mol   
99+

Enthalpy of Atomization
129.70 kJ/mol   
99+
194.60 kJ/mol   
99+

Standard Molar Entropy
41.60 J/mol.K   
36
64.80 J/mol.K   
17

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