1 Periodic Table
1.1 Symbol
Tl
1.2 Group Number
1.3 Period Number
1.4 Block
p block
1.5 Element Family
Post-Transition
1.6 CAS Number
7440280
Rank: 52 (Overall) ▶
7429905
54386242
1.7 Space Group Name
P63/mmc
1.8 Space Group Number
194.00
Rank: 5 (Overall) ▶
11
229
2 Facts
2.1 Interesting Facts
- Compounds of Thallium metal are highly Toxic.
- Thallium metal is being suspected as a human carcinogen.
2.2 Sources
Found As a By-product, Ores of metals, Ores of Minerals
2.3 History
2.3.1 Who Discovered
William Crookes
2.3.2 Discovery
In 1861
2.4 Abundance
2.4.1 Abundance In Universe
5 * 10-9 %
Rank: 32 (Overall) ▶
5E-09
0.11
2.4.2 Abundance In Sun
~0.0000001 %
Rank: 26 (Overall) ▶
1E-08
0.1
2.4.3 Abundance In Meteorites
0.00 %
Rank: 41 (Overall) ▶
1.7E-07
22
2.4.4 Abundance In Earth's Crust
0.00 %
Rank: 42 (Overall) ▶
9.9E-12
8.1
2.4.5 Abundance In Oceans
0.00 %
Rank: 34 (Overall) ▶
2E-23
1.1
2.4.6 Abundance In Humans
Not Available
Rank: N/A (Overall) ▶
1E-13
1.4
3 Uses
3.1 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.
3.1.1 Industrial Uses
Chemical Industry
3.1.2 Medical Uses
Medical Research
3.1.3 Other Uses
Alloys
3.2 Biological Properties
3.2.1 Toxicity
Highly Toxic
3.2.2 Present in Human Body
✔
✘
70% - Post Transition Metals Metals have it !
▶
3.2.3 In Blood
0.00 Blood/mg dm-3
Rank: 34 (Overall) ▶
0
1970
3.2.4 In Bone
0.00 p.p.m.
Rank: 33 (Overall) ▶
0
170000
4 Physical
4.1 Melting Point
303.50 °C
Rank: 69 (Overall) ▶
27
3410
4.2 Boiling Point
1,457.00 °C
Rank: 60 (Overall) ▶
147
5660
4.3 Appearance
4.3.1 Physical State
Solid
4.3.2 Color
Silvery White
4.3.3 Luster
NA
4.4 Hardness
4.4.1 Mohs Hardness
1.20
Rank: 20 (Overall) ▶
0.2
8.5
4.4.2 Brinell Hardness
26.50 MPa
Rank: 50 (Overall) ▶
0.14
3490
4.4.3 Vickers Hardness
Not Available
Rank: N/A (Overall) ▶
121
3430
4.5 Speed of Sound
818.00 m/s
Rank: 53 (Overall) ▶
818
16200
4.6 Optical Properties
4.6.1 Refractive Index
Not Available
Rank: N/A (Overall) ▶
1.000933
1.7229
4.6.2 Reflectivity
Not Available
Rank: N/A (Overall) ▶
58
97
4.7 Allotropes
✔
✘
20% - Post Transition Metals Metals have it !
▶
4.7.1 α Allotropes
Not Available
4.7.2 β Allotropes
Not Available
4.7.3 γ Allotropes
Not Available
5 Chemical
5.1 Chemical Formula
Tl
5.2 Isotopes
5.2.1 Known Isotopes
5.3 Electronegativity
5.3.1 Pauling Electronegativity
1.62
Rank: 21 (Overall) ▶
0.7
2.54
5.3.2 Sanderson Electronegativity
5.3.3 Allred Rochow Electronegativity
1.44
Rank: 17 (Overall) ▶
0.86
1.82
5.3.4 Mulliken-Jaffe Electronegativity
5.3.5 Allen Electronegativity
1.79
Rank: 13 (Overall) ▶
0.659
2.7
5.4 Electropositivity
5.4.1 Pauling Electropositivity
2.38
Rank: 33 (Overall) ▶
1.46
3.3
5.5 Ionization Energies
5.5.1 1st Energy Level
589.40 kJ/mol
Rank: 58 (Overall) ▶
375.7
26130
5.5.2 2nd Energy Level
1,971.00 kJ/mol
Rank: 14 (Overall) ▶
710.2162
28750
5.5.3 3rd Energy Level
2,878.00 kJ/mol
Rank: 32 (Overall) ▶
1600
34230
5.5.4 4th Energy Level
Not Available
Rank: N/A (Overall) ▶
2780
37066
5.5.5 5th Energy Level
Not Available
Rank: N/A (Overall) ▶
4305.2
97510
5.5.6 6th Energy Level
Not Available
Rank: N/A (Overall) ▶
5715.8
105800
5.5.7 7th Energy level
Not Available
Rank: N/A (Overall) ▶
7226.8
114300
5.5.8 8th Energy Level
Not Available
Rank: N/A (Overall) ▶
8857.4
125300
5.5.9 9th Energy Level
Not Available
Rank: N/A (Overall) ▶
14110
134700
5.5.10 10th Energy Level
Not Available
Rank: N/A (Overall) ▶
17100
144300
5.5.11 11th Energy Level
Not Available
Rank: N/A (Overall) ▶
19900
169988
5.5.12 12th Energy Level
Not Available
Rank: N/A (Overall) ▶
22219
189368
5.5.13 13th Energy Level
Not Available
Rank: N/A (Overall) ▶
26930
76015
5.5.14 14th Energy Level
Not Available
Rank: N/A (Overall) ▶
29196
86450
5.5.15 15th Energy Level
Not Available
Rank: N/A (Overall) ▶
41987
97510
5.5.16 16th Energy Level
Not Available
Rank: N/A (Overall) ▶
47206
109480
5.5.17 17th Energy Level
Not Available
Rank: N/A (Overall) ▶
52737
122200
5.5.18 18th Energy Level
Not Available
Rank: N/A (Overall) ▶
58570
134810
5.5.19 19th Energy Level
Not Available
Rank: N/A (Overall) ▶
64702
148700
5.5.20 20th Energy Level
Not Available
Rank: N/A (Overall) ▶
80400
171200
5.5.21 21st Energy Level
Not Available
Rank: N/A (Overall) ▶
87000
179100
5.5.22 22nd Energy Level
Not Available
Rank: N/A (Overall) ▶
93400
184900
5.5.23 23rd Energy Level
Not Available
Rank: N/A (Overall) ▶
98420
198800
5.5.24 24th Energy Level
Not Available
Rank: N/A (Overall) ▶
104400
195200
5.5.25 25th Energy Level
Not Available
Rank: N/A (Overall) ▶
121900
121900
5.5.26 26th Energy Level
Not Available
Rank: N/A (Overall) ▶
127700
127700
5.5.27 27th Energy Level
Not Available
Rank: N/A (Overall) ▶
133800
133800
5.5.28 28th Energy Level
Not Available
Rank: N/A (Overall) ▶
139800
139800
5.5.29 29th Energy Level
Not Available
Rank: N/A (Overall) ▶
148100
148100
5.5.30 30th Energy Level
Not Available
Rank: N/A (Overall) ▶
154500
154500
5.6 Electrochemical Equivalent
7.63 g/amp-hr
Rank: 2 (Overall) ▶
0.16812
8.3209
5.7 Electron Work Function
3.84 eV
Rank: 28 (Overall) ▶
2.14
5.65
5.8 Other Chemical Properties
Corrosion, Ionization, Radioactive Isotopes, Solubility
6 Atomic
6.1 Atomic Number
6.2 Electron Configuration
[Xe] 4f14 5d10 6s2 6p1
6.3 Crystal Structure
Hexagonal Close Packed (HCP)
6.3.1 Crystal Lattice
6.4 Atom
6.4.1 Number of Protons
6.4.2 Number of Neutrons
6.4.3 Number of Electrons
6.5 Radius of an Atom
6.5.1 Atomic Radius
170.00 pm
Rank: 22 (Overall) ▶
112
265
6.5.2 Covalent Radius
145.00 pm
Rank: 39 (Overall) ▶
96
260
6.5.3 Van der Waals Radius
196.00 pm
Rank: 30 (Overall) ▶
139
348
6.6 Atomic Weight
204.38 amu
Rank: 31 (Overall) ▶
6.94
294
6.7 Atomic Volume
17.20 cm3/mol
Rank: 31 (Overall) ▶
1.39
71.07
6.8 Adjacent Atomic Numbers
6.8.1 Previous Element
6.8.2 Next Element
6.9 Valence Electron Potential
9.60 (-eV)
Rank: 64 (Overall) ▶
8
392.42
6.10 Lattice Constant
345.66 pm
Rank: 45 (Overall) ▶
228.58
891.25
6.11 Lattice Angles
π/2, π/2, 2 π/3
6.12 Lattice C/A Ratio
7 Mechanical
7.1 Density
7.1.1 Density At Room Temperature
11.85 g/cm3
Rank: 31 (Overall) ▶
0.534
40.7
7.1.2 Density When Liquid (at m.p.)
11.22 g/cm3
Rank: 13 (Overall) ▶
0.512
20
7.2 Tensile Strength
Not Available
Rank: N/A (Overall) ▶
2.5
11000
7.3 Viscosity
Not Available
Rank: N/A (Overall) ▶
0.001526
0.001526
7.4 Vapor Pressure
7.4.1 Vapor Pressure at 1000 K
16.90 (Pa)
Rank: 5 (Overall) ▶
2.47E-11
121
7.4.2 Vapor Pressure at 2000 K
Not Available
Rank: N/A (Overall) ▶
2.62E-10
774
7.5 Elasticity properties
7.5.1 Shear Modulus
2.80 GPa
Rank: 51 (Overall) ▶
1.3
222
7.5.2 Bulk Modulus
43.00 GPa
Rank: 28 (Overall) ▶
1.6
462
7.5.3 Young's Modulus
8.00 GPa
Rank: 54 (Overall) ▶
1.7
528
7.6 Poisson Ratio
7.7 Other Mechanical Properties
Ductile, Sectile
8 Magnetic
8.1 Magnetic Characteristics
8.1.1 Specific Gravity
11.85
Rank: 22 (Overall) ▶
0.53
4500
8.1.2 Magnetic Ordering
Diamagnetic
8.1.3 Permeability
Not Available
Rank: N/A (Overall) ▶
1.25643E-06
0.0063
8.1.4 Susceptibility
Not Available
Rank: N/A (Overall) ▶
-0.000166
200000
8.2 Electrical Properties
8.2.1 Electrical Property
Conductor
8.2.2 Resistivity
0.18 nΩ·m
Rank: 70 (Overall) ▶
0.18
961
8.2.3 Electrical Conductivity
0.06 106/cm Ω
Rank: 32 (Overall) ▶
0.00666
0.63
8.2.4 Electron Affinity
19.20 kJ/mol
Rank: 32 (Overall) ▶
0
222.8
9 Thermal
9.1 Specific Heat
0.13 J/(kg K)
Rank: 39 (Overall) ▶
0.11
3.6
9.2 Molar Heat Capacity
26.32 J/mol·K
Rank: 29 (Overall) ▶
16.443
62.7
9.3 Thermal Conductivity
46.10 W/m·K
Rank: 33 (Overall) ▶
6.3
429
9.4 Critical Temperature
Not Available
Rank: N/A (Overall) ▶
26.3
3223
9.5 Thermal Expansion
29.90 µm/(m·K)
Rank: 12 (Overall) ▶
4.5
97
9.6 Enthalpy
9.6.1 Enthalpy of Vaporization
162.10 kJ/mol
Rank: 45 (Overall) ▶
7.32
799.1
9.6.2 Enthalpy of Fusion
4.27 kJ/mol
Rank: 54 (Overall) ▶
2.1
35.23
9.6.3 Enthalpy of Atomization
179.90 kJ/mol
Rank: 48 (Overall) ▶
61.5
837
9.7 Standard Molar Entropy
64.20 J/mol.K
Rank: 19 (Overall) ▶
9.5
198.1