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Tungsten vs Cadmium


Cadmium vs Tungsten


Periodic Table

Symbol
W  
Cd  

Group Number
6  
12
12  
6

Period Number
6  
5  

Block
d block  
d block  

Element Family
Transition Metal  
Transition Metal  

CAS Number
7440337  
99+
7440439  
99+

Space Group Name
Im_ 3m  
P63/mmc  

Space Group Number
229.00  
2
194.00  
7

Facts

Interesting Facts
  • Tungsten element has the second highest melting point.
  • Pure tungsten can easily cut down with the help of hacksaw.
  
  • 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, Mining, Ores of Minerals  
Found As a By-product, Found in Minerals, Mining  

History
  
  

Who Discovered
-  
Karl Samuel Leberecht Hermann and Friedrich Stromeyer  

Discovery
In 1781  
In 1817  

Abundance
  
  

Abundance In Universe
0.00 %  
28
0.00 %  
23

Abundance In Sun
0.00 %  
23
0.00 %  
21

Abundance In Meteorites
0.00 %  
39
0.00 %  
31

Abundance In Earth's Crust
0.00 %  
39
0.00 %  
99+

Abundance In Oceans
0.00 %  
18
0.00 %  
28

Abundance In Humans
0.00 %  
24
0.00 %  
12

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 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, Electrical Industry, Electronic Industry  
Aerospace Industry, Ammunition Industry, Chemical Industry, Electrical Industry, Electronic Industry  

Medical Uses
-  
-  

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
0.01 Blood/mg dm-3  
24

In Bone
0.00 p.p.m.  
40
1.80 p.p.m.  
16

Physical

Melting Point
3,410.00 °C  
1
320.90 °C  
99+

Boiling Point
5,660.00 °C  
1
765.00 °C  
99+

Appearance
  
  

Physical State
Solid  
Solid  

Color
Grayish White  
Silvery Bluish-Gray  

Luster
Lustrous  
Metallic  

Hardness
  
  

Mohs Hardness
7.50  
2
2.00  
17

Brinell Hardness
2,000.00 MPa  
4
203.00 MPa  
99+

Vickers Hardness
3,430.00 MPa  
3
90.00 MPa  
99+

Speed of Sound
4,620.00 m/s  
20
2,310.00 m/s  
99+

Optical Properties
  
  

Refractive Index
2.10  
11
1.71  
26

Reflectivity
62.00 %  
21
67.00 %  
16

Allotropes
No  
No  

α Allotropes
-  
-  

β Allotropes
-  
-  

γ Allotropes
-  
-  

Chemical

Chemical Formula
W  
Cd  

Isotopes
  
  

Known Isotopes
33  
6
34  
5

Electronegativity
  
  

Pauling Electronegativity
2.36  
3
1.69  
18

Sanderson Electronegativity
0.98  
99+
1.98  
11

Allred Rochow Electronegativity
1.40  
20
1.46  
16

Mulliken-Jaffe Electronegativity
2.36  
3
1.53  
25

Allen Electronegativity
1.47  
33
1.52  
30

Electropositivity
  
  

Pauling Electropositivity
1.64  
99+
2.31  
37

Ionization Energies
  
  

1st Energy Level
770.00 kJ/mol  
16
867.80 kJ/mol  
11

2nd Energy Level
1,700.00 kJ/mol  
30
1,631.40 kJ/mol  
33

3rd Energy Level
2,045.40 kJ/mol  
99+
3,616.00 kJ/mol  
13

4th Energy Level
7,700.00 kJ/mol  
8
867.80 kJ/mol  
99+

5th Energy Level
7,700.00 kJ/mol  
17
4,040.00 kJ/mol  
99+

6th Energy Level
7,700.00 kJ/mol  
35
8,640.00 kJ/mol  
28

7th Energy level
7,700.00 kJ/mol  
29
8,640.00 kJ/mol  
24

8th Energy Level
7,700.00 kJ/mol  
29
8,640.00 kJ/mol  
24

9th Energy Level
7,700.00 kJ/mol  
25
8,670.00 kJ/mol  
22

10th Energy Level
7,700.00 kJ/mol  
29
8,650.00 kJ/mol  
25

11th Energy Level
7,700.00 kJ/mol  
28
8,670.00 kJ/mol  
22

12th Energy Level
7,700.00 kJ/mol  
99+
86,400.00 kJ/mol  
3

13th Energy Level
7,700.00 kJ/mol  
21
8,640.00 kJ/mol  
17

14th Energy Level
770.00 kJ/mol  
99+
8,650.00 kJ/mol  
15

15th Energy Level
77,000.00 kJ/mol  
18
86,400.00 kJ/mol  
10

16th Energy Level
77,000.00 kJ/mol  
13
86,400.00 kJ/mol  
10

17th Energy Level
770.00 kJ/mol  
34
864.90 kJ/mol  
28

18th Energy Level
7,700.00 kJ/mol  
24
8,670.00 kJ/mol  
17

19th Energy Level
770.00 kJ/mol  
31
867.80 kJ/mol  
26

20th Energy Level
770.00 kJ/mol  
25
865.00 kJ/mol  
16

21st Energy Level
770.00 kJ/mol  
99+
8,670.00 kJ/mol  
10

22nd Energy Level
770.00 kJ/mol  
19
864.00 kJ/mol  
14

23rd Energy Level
770.00 kJ/mol  
99+
864.90 kJ/mol  
40

24th Energy Level
770.00 kJ/mol  
15
864.90 kJ/mol  
10

25th Energy Level
770.00 kJ/mol  
14
864.00 kJ/mol  
8

26th Energy Level
770.00 kJ/mol  
14
864.90 kJ/mol  
8

27th Energy Level
770.00 kJ/mol  
13
864.90 kJ/mol  
8

28th Energy Level
770.00 kJ/mol  
19
864.90 kJ/mol  
11

29th Energy Level
770.00 kJ/mol  
19
864.90 kJ/mol  
12

30th Energy Level
770.00 kJ/mol  
14
864.00 kJ/mol  
8

Electrochemical Equivalent
1.14 g/amp-hr  
99+
2.10 g/amp-hr  
31

Electron Work Function
4.55 eV  
18
4.22 eV  
29

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

Atomic

Atomic Number
74  
99+
48  
99+

Electron Configuration
[Xe] 4f14 5d4 6s2  
[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
74  
99+
48  
99+

Number of Neutrons
110  
28
64  
99+

Number of Electrons
74  
99+
48  
99+

Radius of an Atom
  
  

Atomic Radius
139.00 pm  
99+
151.00 pm  
34

Covalent Radius
162.00 pm  
31
144.00 pm  
99+

Van der Waals Radius
200.00 pm  
35
158.00 pm  
99+

Atomic Weight
183.84 amu  
37
112.41 amu  
99+

Atomic Volume
9.53 cm3/mol  
99+
13.10 cm3/mol  
99+

Adjacent Atomic Numbers
  
  

Previous Element
Tantalum
  
Silver
  

Next Element
Rhenium
  
Indium
  

Valence Electron Potential
140.00 (-eV)  
5
30.00 (-eV)  
99+

Lattice Constant
316.52 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
1.29  
99+
1.89  
2

Mechanical

Density
  
  

Density At Room Temperature
19.25 g/cm3  
16
8.65 g/cm3  
99+

Density When Liquid (at m.p.)
17.60 g/cm3  
15
8.00 g/cm3  
99+

Tensile Strength
370.00 MPa  
11
62.00 MPa  
34

Viscosity
0.00  
1
0.00  
13

Vapor Pressure
  
  

Vapor Pressure at 1000 K
0.00 (Pa)  
37
0.00 (Pa)  
22

Vapor Pressure at 2000 K
0.00 (Pa)  
99+
0.00 (Pa)  
24

Elasticity properties
  
  

Shear Modulus
161.00 GPa  
5
19.00 GPa  
99+

Bulk Modulus
310.00 GPa  
4
42.00 GPa  
34

Young's Modulus
411.00 GPa  
4
50.00 GPa  
39

Poisson Ratio
0.28  
17
0.30  
14

Other Mechanical Properties
Ductile, Malleable  
Ductile, Malleable  

Magnetic

Magnetic Characteristics
  
  

Specific Gravity
19.22  
18
8.65  
99+

Magnetic Ordering
Paramagnetic  
Diamagnetic  

Permeability
0.00 H/m  
17
0.00 H/m  
10

Susceptibility
0.00  
23
0.00  
24

Electrical Properties
  
  

Electrical Property
Superconductor  
Semiconductor  

Resistivity
52.80 nΩ·m  
99+
72.70 nΩ·m  
36

Electrical Conductivity
0.19 106/cm Ω  
10
0.14 106/cm Ω  
17

Electron Affinity
78.60 kJ/mol  
15
0.00 kJ/mol  
99+

Thermal

Specific Heat
0.13 J/(kg K)  
40
0.23 J/(kg K)  
26

Molar Heat Capacity
24.27 J/mol·K  
99+
26.02 J/mol·K  
40

Thermal Conductivity
173.00 W/m·K  
7
96.60 W/m·K  
16

Critical Temperature
3,695.00 K  
1
594.00 K  
99+

Thermal Expansion
4.50 µm/(m·K)  
99+
30.80 µm/(m·K)  
10

Enthalpy
  
  

Enthalpy of Vaporization
799.10 kJ/mol  
1
100.00 kJ/mol  
99+

Enthalpy of Fusion
35.23 kJ/mol  
1
6.19 kJ/mol  
99+

Enthalpy of Atomization
837.00 kJ/mol  
1
113.00 kJ/mol  
99+

Standard Molar Entropy
32.60 J/mol.K  
99+
51.80 J/mol.K  
38

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