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Iron vs Cadmium

Iron
Cadmium
Cadmium vs Iron


Periodic Table
Symbol
Fe  
Cd  
Group Number
8  
10
12  
6
Period Number
4  
5  
Block
d block  
d block  
Element Family
Transition Metal  
Transition Metal  
CAS Number
7439896  
99+
7440439  
99+
Space Group Name
Im_ 3m  
P63/mmc  
Space Group Number
229.00  
2
194.00  
7
Facts
Interesting Facts
  • Iron is not always magnetic in nature, its allotrope are ferromagnetic and the B allotrope is nonmagnetic.
  • The blood consists Iron in hemoglobin molecules to transfer Oxygen in the body.
  
  • 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.
  
Sources
Earth's crust, Found in Minerals  
Found As a By-product, Found in Minerals, Mining  
History
  
  
Who Discovered
-  
Karl Samuel Leberecht Hermann and Friedrich Stromeyer  
Discovery
Before 5000 BC  
In 1817  
Abundance
  
  
Abundance In Universe
0.11 %  
1
0.00 %  
23
Abundance In Sun
0.10 %  
1
0.00 %  
21
Abundance In Meteorites
22.00 %  
1
0.00 %  
31
Abundance In Earth's Crust
6.30 %  
2
0.00 %  
99+
Abundance In Oceans
0.00 %  
12
0.00 %  
28
Abundance In Humans
0.01 %  
6
0.00 %  
12
Uses
Uses & Benefits
  • Iron metal alloy steel is used in the application of civil engineering and manufacturing.
  • Alloys of iron with nickel, vanadium, chromium, tungsten and manganese have very useful properties.
  
  • 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.
  
Industrial Uses
Aerospace Industry, Automobile Industry, Chemical Industry, Electrical Industry, Electronic Industry  
Aerospace Industry, Ammunition Industry, Chemical Industry, Electrical Industry, Electronic Industry  
Medical Uses
Pharmaceutical Industry, Surgical Instruments Manufacturing  
-  
Other Uses
Alloys, Sculptures, Statues  
Alloys  
Biological Properties
  
  
Toxicity
Non Toxic  
Toxic  
Present in Human Body
Yes  
Yes  
In Blood
447.00 Blood/mg dm-3  
3
0.01 Blood/mg dm-3  
24
In Bone
380.00 p.p.m.  
5
1.80 p.p.m.  
16
Physical
Melting Point
1,535.00 °C  
25
320.90 °C  
99+
Boiling Point
2,750.00 °C  
39
765.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Gray  
Silvery Bluish-Gray  
Luster
Metallic  
Metallic  
Hardness
  
  
Mohs Hardness
4.00  
11
2.00  
17
Brinell Hardness
200.00 MPa  
99+
203.00 MPa  
99+
Vickers Hardness
608.00 MPa  
27
90.00 MPa  
99+
Speed of Sound
5,120.00 m/s  
12
2,310.00 m/s  
99+
Optical Properties
  
  
Refractive Index
2.60  
4
1.71  
26
Reflectivity
65.00 %  
18
67.00 %  
16
Allotropes
Yes  
No  
α Allotropes
Ferrite (alpha Iron)  
-  
β Allotropes
beta Iron  
-  
γ Allotropes
gamma Iron  
-  
Chemical
Chemical Formula
Fe  
Cd  
Isotopes
  
  
Known Isotopes
26  
13
34  
5
Electronegativity
  
  
Pauling Electronegativity
1.83  
15
1.69  
18
Sanderson Electronegativity
2.20  
8
1.98  
11
Allred Rochow Electronegativity
1.64  
9
1.46  
16
Mulliken-Jaffe Electronegativity
1.83  
16
1.53  
25
Allen Electronegativity
1.80  
15
1.52  
30
Electropositivity
  
  
Pauling Electropositivity
2.17  
99+
2.31  
37
Ionization Energies
  
  
1st Energy Level
762.50 kJ/mol  
17
867.80 kJ/mol  
11
2nd Energy Level
1,561.90 kJ/mol  
37
1,631.40 kJ/mol  
33
3rd Energy Level
2,957.00 kJ/mol  
29
3,616.00 kJ/mol  
13
4th Energy Level
5,290.00 kJ/mol  
25
867.80 kJ/mol  
99+
5th Energy Level
7,240.00 kJ/mol  
25
4,040.00 kJ/mol  
99+
6th Energy Level
9,560.00 kJ/mol  
20
8,640.00 kJ/mol  
28
7th Energy level
12,060.00 kJ/mol  
15
8,640.00 kJ/mol  
24
8th Energy Level
14,580.00 kJ/mol  
14
8,640.00 kJ/mol  
24
9th Energy Level
22,540.00 kJ/mol  
5
8,670.00 kJ/mol  
22
10th Energy Level
25,290.00 kJ/mol  
8
8,650.00 kJ/mol  
25
11th Energy Level
28,000.00 kJ/mol  
9
8,670.00 kJ/mol  
22
12th Energy Level
31,920.00 kJ/mol  
31
86,400.00 kJ/mol  
3
13th Energy Level
34,830.00 kJ/mol  
9
8,640.00 kJ/mol  
17
14th Energy Level
37,840.00 kJ/mol  
11
8,650.00 kJ/mol  
15
15th Energy Level
44,100.00 kJ/mol  
99+
86,400.00 kJ/mol  
10
16th Energy Level
47,206.00 kJ/mol  
99+
86,400.00 kJ/mol  
10
17th Energy Level
122,200.00 kJ/mol  
1
864.90 kJ/mol  
28
18th Energy Level
131,000.00 kJ/mol  
2
8,670.00 kJ/mol  
17
19th Energy Level
140,500.00 kJ/mol  
3
867.80 kJ/mol  
26
20th Energy Level
152,600.00 kJ/mol  
5
865.00 kJ/mol  
16
21st Energy Level
163,000.00 kJ/mol  
5
8,670.00 kJ/mol  
10
22nd Energy Level
173,600.00 kJ/mol  
4
864.00 kJ/mol  
14
23rd Energy Level
188,100.00 kJ/mol  
4
864.90 kJ/mol  
40
24th Energy Level
195,200.00 kJ/mol  
1
864.90 kJ/mol  
10
25th Energy Level
762.00 kJ/mol  
15
864.00 kJ/mol  
8
26th Energy Level
762.50 kJ/mol  
15
864.90 kJ/mol  
8
27th Energy Level
762.50 kJ/mol  
14
864.90 kJ/mol  
8
28th Energy Level
762.50 kJ/mol  
20
864.90 kJ/mol  
11
29th Energy Level
762.50 kJ/mol  
20
864.90 kJ/mol  
12
30th Energy Level
762.00 kJ/mol  
15
864.00 kJ/mol  
8
Electrochemical Equivalent
0.69 g/amp-hr  
99+
2.10 g/amp-hr  
31
Electron Work Function
4.70 eV  
15
4.22 eV  
29
Other Chemical Properties
Corrosion, Ionization, Solubility  
Chemical Stability, Anti Corrosion, Ionization, Radioactive Isotopes, Solubility  
Atomic
Atomic Number
26  
99+
48  
99+
Electron Configuration
[Ar] 3d6 4s2  
[Kr] 4d10 5s2  
Crystal Structure
Body Centered Cubic (BCC)  
Hexagonal Close Packed (HCP)  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100  
HCP-Crystal-Structure-of-Cadmium.jpg#100  
Atom
  
  
Number of Protons
26  
99+
48  
99+
Number of Neutrons
30  
99+
64  
99+
Number of Electrons
26  
99+
48  
99+
Radius of an Atom
  
  
Atomic Radius
126.00 pm  
99+
151.00 pm  
34
Covalent Radius
132.00 pm  
99+
144.00 pm  
99+
Van der Waals Radius
200.00 pm  
35
158.00 pm  
99+
Atomic Weight
55.85 amu  
99+
112.41 amu  
99+
Atomic Volume
7.10 cm3/mol  
99+
13.10 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Manganese
  
Silver
  
Next Element
Cobalt
  
Indium
  
Valence Electron Potential
67.00 (-eV)  
20
30.00 (-eV)  
99+
Lattice Constant
286.65 pm  
99+
297.94 pm  
99+
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, 2 π/3  
Lattice C/A Ratio
1.35  
99+
1.89  
2
Mechanical
Density
  
  
Density At Room Temperature
7.87 g/cm3  
99+
8.65 g/cm3  
99+
Density When Liquid (at m.p.)
6.98 g/cm3  
99+
8.00 g/cm3  
99+
Tensile Strength
11,000.00 MPa  
1
62.00 MPa  
34
Viscosity
0.00  
19
0.00  
13
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
30
0.00 (Pa)  
22
Vapor Pressure at 2000 K
36.80 (Pa)  
5
0.00 (Pa)  
24
Elasticity properties
  
  
Shear Modulus
82.00 GPa  
11
19.00 GPa  
99+
Bulk Modulus
170.00 GPa  
10
42.00 GPa  
34
Young's Modulus
211.00 GPa  
9
50.00 GPa  
39
Poisson Ratio
0.29  
15
0.30  
14
Other Mechanical Properties
Ductile, Malleable, Weldable  
Ductile, Malleable  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
7.20  
99+
8.65  
99+
Magnetic Ordering
Ferromagnetic  
Diamagnetic  
Permeability
0.01 H/m  
1
0.00 H/m  
10
Susceptibility
200,000.00  
1
0.00  
24
Electrical Properties
  
  
Electrical Property
Conductor  
Semiconductor  
Resistivity
96.10 nΩ·m  
32
72.70 nΩ·m  
36
Electrical Conductivity
0.10 106/cm Ω  
24
0.14 106/cm Ω  
17
Electron Affinity
15.70 kJ/mol  
40
0.00 kJ/mol  
99+
Thermal
Specific Heat
0.44 J/(kg K)  
13
0.23 J/(kg K)  
26
Molar Heat Capacity
25.10 J/mol·K  
99+
26.02 J/mol·K  
40
Thermal Conductivity
80.40 W/m·K  
22
96.60 W/m·K  
16
Critical Temperature
1,811.00 K  
29
594.00 K  
99+
Thermal Expansion
11.80 µm/(m·K)  
99+
30.80 µm/(m·K)  
10
Enthalpy
  
  
Enthalpy of Vaporization
351.00 kJ/mol  
33
100.00 kJ/mol  
99+
Enthalpy of Fusion
14.90 kJ/mol  
23
6.19 kJ/mol  
99+
Enthalpy of Atomization
414.20 kJ/mol  
24
113.00 kJ/mol  
99+
Standard Molar Entropy
27.30 J/mol.K  
99+
51.80 J/mol.K  
38
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