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Cadmium vs Bismuth

Cadmium
Bismuth
Bismuth vs Cadmium


Periodic Table
Symbol
Cd   
Bi   
Group Number
12   
6
15   
3
Period Number
5   
6   
Block
d block   
p block   
Element Family
Transition Metal   
Post-​Transition   
CAS Number
7440439   
99+
7440699   
22
Space Group Name
P63/mmc   
C12/m1   
Space Group Number
194.00   
5
12.00   
12
Facts
Interesting Facts
  • Naturally occurring minor elements include Cadmium.
  • Cadmium is released into atmosphere to control volcanic eruption and forest fires.
  • It is used for electroplating of Steel for corrosion resistance.
  • It can absorb neutrons and used in nuclear reactor to control atomic fission.
  
  • Bismuth metal is soluble and reacts with concentrated nitric acid.
  • It oxides are used as a yellow pigment in paint. Bismuth chloride oxide BiClO gives a pearly texture to cosmetics.
  
Sources
Found As a By-product, Found in Minerals, Mining   
Found in Minerals, Mining, Ores of Minerals   
History
  
  
Who Discovered
Karl Samuel Leberecht Hermann and Friedrich Stromeyer   
Claude François Geoffroy   
Discovery
In 1817   
In 1753   
Abundance
  
  
Abundance In Universe
2 * 10-7 %   
22
7 * 10-8 %   
25
Abundance In Sun
~0.0000006 %   
21
~0.000006 %   
14
Abundance In Meteorites
0.00 %   
31
0.00 %   
99+
Abundance In Earth's Crust
0.00 %   
99+
0.00 %   
99+
Abundance In Oceans
0.00 %   
28
0.00 %   
24
Abundance In Humans
0.00 %   
11
Not Available   
Uses
Uses & Benefits
  • It has very limited uses as it is a toxic metal and it can cause birth defects, cancer, etc.
  • Almost 80% of Cadmium metal is used in Nickel cadmium Batteries and now it is getting replaced with nickel hydride.
  
  • Tin and bismuth alloys have a very low melting point and hence it is used in fire detector and the fire extinguishers. It also used in electric solders and fuses.
  
Industrial Uses
Aerospace Industry, Ammunition Industry, Chemical Industry, Electrical Industry, Electronic Industry   
Automobile Industry, Chemical Industry, Electrical Industry, Electronic Industry   
Medical Uses
NA   
Pharmaceutical Industry   
Other Uses
Alloys   
Alloys   
Biological Properties
  
  
Toxicity
Toxic   
Low Toxic   
Present in Human Body
Yes   
Yes   
In Blood
0.01 Blood/mg dm-3   
24
0.02 Blood/mg dm-3   
20
In Bone
1.80 p.p.m.   
15
0.20 p.p.m.   
22
Physical Properties
Melting Point
320.90 °C   
99+
271.30 °C   
99+
Boiling Point
765.00 °C   
99+
1,560.00 °C   
99+
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silvery Bluish-Gray   
Silver   
Luster
Metallic   
Metallic   
Hardness
  
  
Mohs Hardness
2.00   
16
2.25   
15
Brinell Hardness
203.00 MPa   
39
70.00 MPa   
99+
Speed of Sound
2,310.00 m/s   
39
1,790.00 m/s   
99+
Optical Properties
  
  
Reflectivity
67.00 %   
11
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
Cd   
Bi   
Isotopes
  
  
Known Isotopes
34   
5
33   
6
Electronegativity
  
  
Pauling Electronegativity
1.69   
17
2.02   
6
Sanderson Electronegativity
1.98   
9
2.34   
3
Allred Rochow Electronegativity
1.46   
15
1.67   
6
Mulliken-Jaffe Electronegativity
1.53   
13
2.15   
4
Allen Electronegativity
1.52   
27
2.01   
4
Electropositivity
  
  
Pauling Electropositivity
2.31   
37
1.98   
99+
Ionization Energies
  
  
1st Energy Level
867.80 kJ/mol   
11
703.00 kJ/mol   
35
2nd Energy Level
1,631.40 kJ/mol   
32
1,610.00 kJ/mol   
33
3rd Energy Level
3,616.00 kJ/mol   
13
2,466.00 kJ/mol   
99+
4th Energy Level
Not Available   
4,370.00 kJ/mol   
28
5th Energy Level
Not Available   
5,400.00 kJ/mol   
30
6th Energy Level
Not Available   
8,520.00 kJ/mol   
19
Electrochemical Equivalent
2.10 g/amp-hr   
27
2.60 g/amp-hr   
19
Electron Work Function
4.22 eV   
22
4.22 eV   
22
Other Chemical Properties
Chemical Stability, Anti Corrosion, Ionization, Radioactive Isotopes, Solubility   
Ionization, Radioactive Isotopes, Solubility   
Atomic Properties
Atomic Number
48   
99+
83   
33
Electron Configuration
[Kr] 4d10 5s2   
[Xe] 4f14 5d10 6s2 6p3   
Crystal Structure
Hexagonal Close Packed (HCP)   
Rhombohedral (RHO)   
Crystal Lattice
HCP-Crystal-Structure-of-Cadmium.jpg#100   
RHO-Crystal-Structure-of-Bismuth.jpg#100   
Atom
  
  
Number of Protons
48   
99+
83   
33
Number of Neutrons
64   
99+
126   
18
Number of Electrons
48   
99+
83   
33
Radius of an Atom
  
  
Atomic Radius
151.00 pm   
32
156.00 pm   
29
Covalent Radius
144.00 pm   
40
148.00 pm   
36
Van der Waals Radius
158.00 pm   
99+
207.00 pm   
26
Atomic Weight
112.41 amu   
99+
208.98 amu   
29
Atomic Volume
13.10 cm3/mol   
39
21.30 cm3/mol   
14
Adjacent Atomic Numbers
  
  
Previous Element
Silver
  
Lead
  
Next Element
Indium
  
Polonium
  
Valence Electron Potential
30.00 (-eV)   
99+
41.90 (-eV)   
99+
Lattice Constant
297.94 pm   
99+
667.40 pm   
2
Lattice Angles
π/2, π/2, 2 π/3   
NA   
Lattice C/A Ratio
1.89   
1
Not Available   
Mechanical Properties
Density
  
  
Density At Room Temperature
8.65 g/cm3   
99+
9.78 g/cm3   
39
Density When Liquid (at m.p.)
8.00 g/cm3   
28
10.05 g/cm3   
18
Tensile Strength
62.00 MPa   
16
Not Available   
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Elasticity properties
  
  
Shear Modulus
19.00 GPa   
35
12.00 GPa   
99+
Bulk Modulus
42.00 GPa   
29
31.00 GPa   
38
Young's Modulus
50.00 GPa   
36
32.00 GPa   
99+
Poisson Ratio
0.30   
14
0.33   
11
Other Mechanical Properties
Ductile, Malleable   
NA   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
8.65   
36
9.79   
30
Magnetic Ordering
Diamagnetic   
Diamagnetic   
Permeability
Not Available   
0.00 H/m   
6
Susceptibility
Not Available   
0.00   
6
Electrical Properties
  
  
Electrical Property
Semiconductor   
Semiconductor   
Resistivity
72.70 nΩ·m   
36
1.29 nΩ·m   
99+
Electrical Conductivity
0.14 106/cm Ω   
15
0.01 106/cm Ω   
99+
Electron Affinity
0.00 kJ/mol   
40
91.20 kJ/mol   
11
Thermal Properties
Specific Heat
0.23 J/(kg K)   
26
0.12 J/(kg K)   
40
Molar Heat Capacity
26.02 J/mol·K   
32
25.52 J/mol·K   
37
Thermal Conductivity
96.60 W/m·K   
16
7.97 W/m·K   
99+
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
30.80 µm/(m·K)   
10
13.40 µm/(m·K)   
28
Enthalpy
  
  
Enthalpy of Vaporization
100.00 kJ/mol   
99+
151.00 kJ/mol   
99+
Enthalpy of Fusion
6.19 kJ/mol   
99+
10.90 kJ/mol   
33
Enthalpy of Atomization
113.00 kJ/mol   
99+
207.10 kJ/mol   
99+
Standard Molar Entropy
51.80 J/mol.K   
27
56.70 J/mol.K   
24
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