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Thallium vs Cobalt

Thallium
Cobalt
Cobalt vs Thallium


Periodic Table
Symbol
Tl  
Co  
Group Number
13  
5
9  
9
Period Number
6  
4  
Block
p block  
d block  
Element Family
Post-​Transition  
Transition Metal  
CAS Number
7440280  
99+
7440484  
38
Space Group Name
P63/mmc  
P63/mmc  
Space Group Number
194.00  
7
194.00  
7
Facts
Interesting Facts
  • Compounds of Thallium metal are highly Toxic.
  • Thallium metal is being suspected as a human carcinogen.
  
  • The main source of Cobalt is as a by-product of copper and nickel metal mining.
  • Cobalt metal can be obtained from other elements like Oxygen, Sulfur and Arsenic.
  • It s also used in electroplating process as it exhibits anti cession properties.
  
Sources
Found As a By-product, Ores of metals, Ores of Minerals  
Found in Compounds, Mining, Ores of Minerals  
History
  
  
Who Discovered
William Crookes  
Georg Brandt  
Discovery
In 1861  
In 1732  
Abundance
  
  
Abundance In Universe
0.00 %  
33
0.00 %  
10
Abundance In Sun
0.00 %  
26
0.00 %  
9
Abundance In Meteorites
0.00 %  
99+
0.06 %  
10
Abundance In Earth's Crust
0.00 %  
99+
0.00 %  
21
Abundance In Oceans
0.00 %  
34
0.00 %  
20
Abundance In Humans
0.00 %  
24
0.00 %  
20
Uses
Uses & Benefits
  • Thallium is a toxic metal and hence it has limited uses. Thallium metal is mostly used for producing photoelectric cells.
  • In thermometer’s mercury alloy has 8% of thallium, as it has a melting point lower than 20°C.
  
  • Its alloys with aluminum and nickel are used to make powerful magnets.
  • Few other alloys exhibit high-temperature strength and hence they are used in Turbines of Jet and Gas engine.
  
Industrial Uses
Chemical Industry  
Chemical Industry, Electrical Industry, Electronic Industry  
Medical Uses
Medical Research  
Pharmaceutical Industry  
Other Uses
Alloys  
Alloys  
Biological Properties
  
  
Toxicity
Highly Toxic  
Toxic  
Present in Human Body
Yes  
Yes  
In Blood
0.00 Blood/mg dm-3  
37
0.04 Blood/mg dm-3  
18
In Bone
0.00 p.p.m.  
38
0.04 p.p.m.  
32
Physical
Melting Point
303.50 °C  
99+
1,495.00 °C  
29
Boiling Point
1,457.00 °C  
99+
2,870.00 °C  
35
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
Gray  
Luster
-  
Metallic  
Hardness
  
  
Mohs Hardness
1.20  
21
5.00  
8
Brinell Hardness
26.50 MPa  
99+
470.00 MPa  
31
Vickers Hardness
120.00 MPa  
99+
1,043.00 MPa  
18
Speed of Sound
818.00 m/s  
99+
4,720.00 m/s  
18
Optical Properties
  
  
Refractive Index
1.90  
18
2.50  
5
Reflectivity
8.00 %  
37
67.00 %  
16
Allotropes
No  
Yes  
α Allotropes
-  
α-Cobalt  
β Allotropes
-  
β-Cobalt  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Tl  
Co  
Isotopes
  
  
Known Isotopes
32  
7
26  
13
Electronegativity
  
  
Pauling Electronegativity
1.62  
22
1.88  
13
Sanderson Electronegativity
2.25  
6
2.56  
1
Allred Rochow Electronegativity
1.44  
18
1.70  
6
Mulliken-Jaffe Electronegativity
1.96  
11
1.88  
14
Allen Electronegativity
1.79  
16
1.84  
13
Electropositivity
  
  
Pauling Electropositivity
2.38  
33
2.12  
99+
Ionization Energies
  
  
1st Energy Level
589.40 kJ/mol  
99+
760.40 kJ/mol  
19
2nd Energy Level
1,971.00 kJ/mol  
14
1,648.00 kJ/mol  
32
3rd Energy Level
2,878.00 kJ/mol  
32
3,232.00 kJ/mol  
22
4th Energy Level
5,890.00 kJ/mol  
17
4,950.00 kJ/mol  
29
5th Energy Level
5,890.00 kJ/mol  
99+
7,670.00 kJ/mol  
18
6th Energy Level
5,890.00 kJ/mol  
99+
9,840.00 kJ/mol  
18
7th Energy level
5,890.00 kJ/mol  
99+
12,440.00 kJ/mol  
11
8th Energy Level
5,890.00 kJ/mol  
99+
15,230.00 kJ/mol  
12
9th Energy Level
5,890.00 kJ/mol  
99+
17,959.00 kJ/mol  
13
10th Energy Level
5,890.00 kJ/mol  
99+
26,570.00 kJ/mol  
7
11th Energy Level
5,890.00 kJ/mol  
99+
29,400.00 kJ/mol  
8
12th Energy Level
5,890.00 kJ/mol  
99+
32,400.00 kJ/mol  
30
13th Energy Level
5,890.00 kJ/mol  
99+
36,600.00 kJ/mol  
8
14th Energy Level
5,890.00 kJ/mol  
37
39,700.00 kJ/mol  
9
15th Energy Level
58,900.00 kJ/mol  
99+
42,800.00 kJ/mol  
99+
16th Energy Level
58,900.00 kJ/mol  
38
49,396.00 kJ/mol  
99+
17th Energy Level
589.40 kJ/mol  
99+
52,737.00 kJ/mol  
13
18th Energy Level
5,890.00 kJ/mol  
99+
134,810.00 kJ/mol  
1
19th Energy Level
589.40 kJ/mol  
99+
145,170.00 kJ/mol  
2
20th Energy Level
589.00 kJ/mol  
99+
154,700.00 kJ/mol  
4
21st Energy Level
589.40 kJ/mol  
99+
167,400.00 kJ/mol  
4
22nd Energy Level
589.00 kJ/mol  
99+
178,100.00 kJ/mol  
3
23rd Energy Level
589.40 kJ/mol  
99+
189,300.00 kJ/mol  
3
24th Energy Level
589.40 kJ/mol  
99+
760.40 kJ/mol  
17
25th Energy Level
589.40 kJ/mol  
99+
760.40 kJ/mol  
17
26th Energy Level
589.40 kJ/mol  
99+
760.40 kJ/mol  
17
27th Energy Level
589.40 kJ/mol  
99+
760.40 kJ/mol  
16
28th Energy Level
589.40 kJ/mol  
99+
760.40 kJ/mol  
22
29th Energy Level
589.40 kJ/mol  
99+
760.40 kJ/mol  
23
30th Energy Level
589.40 kJ/mol  
99+
760.40 kJ/mol  
17
Electrochemical Equivalent
7.63 g/amp-hr  
2
1.10 g/amp-hr  
99+
Electron Work Function
3.84 eV  
39
5.00 eV  
9
Other Chemical Properties
Corrosion, Ionization, Radioactive Isotopes, Solubility  
Chemical Stability, Ionization  
Atomic
Atomic Number
81  
35
22  
99+
Electron Configuration
[Xe] 4f14 5d10 6s2 6p1  
[Ar] 3d2 4s2  
Crystal Structure
Hexagonal Close Packed (HCP)  
Hexagonal Close Packed (HCP)  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100  
HCP-Crystal-Structure-of-Cobalt.jpg#100  
Atom
  
  
Number of Protons
81  
35
22  
99+
Number of Neutrons
123  
21
26  
99+
Number of Electrons
81  
35
22  
99+
Radius of an Atom
  
  
Atomic Radius
170.00 pm  
24
147.00 pm  
36
Covalent Radius
145.00 pm  
99+
160.00 pm  
32
Van der Waals Radius
196.00 pm  
37
200.00 pm  
35
Atomic Weight
204.38 amu  
31
47.87 amu  
99+
Atomic Volume
17.20 cm3/mol  
99+
10.64 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Mercury
  
Iron
  
Next Element
Lead
  
Nickel
  
Valence Electron Potential
9.60 (-eV)  
99+
95.20 (-eV)  
10
Lattice Constant
345.66 pm  
99+
295.08 pm  
99+
Lattice Angles
π/2, π/2, 2 π/3  
π/2, π/2, 2 π/3  
Lattice C/A Ratio
1.60  
23
1.26  
99+
Mechanical
Density
  
  
Density At Room Temperature
11.85 g/cm3  
33
4.51 g/cm3  
99+
Density When Liquid (at m.p.)
11.22 g/cm3  
33
4.11 g/cm3  
99+
Tensile Strength
47.00 MPa  
39
434.00 MPa  
10
Viscosity
0.00  
22
0.00  
25
Vapor Pressure
  
  
Vapor Pressure at 1000 K
16.90 (Pa)  
5
0.00 (Pa)  
22
Vapor Pressure at 2000 K
0.00 (Pa)  
38
0.98 (Pa)  
14
Elasticity properties
  
  
Shear Modulus
2.80 GPa  
99+
44.00 GPa  
17
Bulk Modulus
43.00 GPa  
33
110.00 GPa  
15
Young's Modulus
8.00 GPa  
99+
116.00 GPa  
20
Poisson Ratio
0.45  
2
0.32  
12
Other Mechanical Properties
Ductile, Sectile  
Ductile  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
11.85  
35
4,500.00  
1
Magnetic Ordering
Diamagnetic  
Paramagnetic  
Permeability
0.00 H/m  
17
0.00 H/m  
17
Susceptibility
0.00  
28
0.00  
3
Electrical Properties
  
  
Electrical Property
Conductor  
Poor Conductor  
Resistivity
0.18 nΩ·m  
99+
420.00 nΩ·m  
12
Electrical Conductivity
0.06 106/cm Ω  
37
0.02 106/cm Ω  
99+
Electron Affinity
19.20 kJ/mol  
38
7.60 kJ/mol  
99+
Thermal
Specific Heat
0.13 J/(kg K)  
40
0.52 J/(kg K)  
9
Molar Heat Capacity
26.32 J/mol·K  
37
25.06 J/mol·K  
99+
Thermal Conductivity
46.10 W/m·K  
33
21.90 W/m·K  
99+
Critical Temperature
577.00 K  
99+
1,768.00 K  
32
Thermal Expansion
29.90 µm/(m·K)  
12
8.60 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
162.10 kJ/mol  
99+
429.00 kJ/mol  
20
Enthalpy of Fusion
4.27 kJ/mol  
99+
15.48 kJ/mol  
19
Enthalpy of Atomization
179.90 kJ/mol  
99+
468.60 kJ/mol  
20
Standard Molar Entropy
64.20 J/mol.K  
20
27.30 J/mol.K  
99+
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