Thallium

Symbol TlAtomic number 81
Atomic mass
204.37
Thermal conductivity
0.461
Atomic radius
1.76
Covalent radius
1.48
Density
11.85
Atomic volume
17.2
Melting point
577
Oxidation states
3,1
Boiling point
1730
Stable isotopes
2
Heat of vapor.
164.1
Electronegativity
2.04
Heat of fusion
4.142
First ionization
6.108
Specific heat
0.13
Electrical conduct.
...
Electron configuration

General descriptionNuclear data
Index

Periodic Table

Chemistry concepts
 
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Thallium

Thallium is a rare metal which has found little application. It forms a high-temperature superconductor compound which has much promise. A radioisotope of thallium is used in medical diagnostic tests to measure the perfusion of blood into the heart muscle.

In the sulfide mineral hutchinsonite,(Tl, Pb)2As5S9 , thallium joins with arsenic and lead.

Atomic dataNuclear data
Index

Periodic Table

Chemistry concepts

Reference
Pauling
Ch. 28
 
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Thallium Nuclear Data

Z
A
Atomic
Mass (u)
Nuclear
Mass(GeV/c2
Binding
Energy(MeV)
Spin
Natural
Abund.
Half-life
Decay
Q
MeV
81
202
201.972085
188.0959
1593.1
2
...
12.23d
b+
1.37
81
203
202.972320
189.0276
1600.9
1/2
0.30
stable
...
...
81
204
203.973839
189.9606
1607.6
2
...
3.78y
b-,EC
0.76,0.35
81
205
204.974400
190.8926
1615.1
1/2
0.70
stable
...
...
81
207
206.977404
192.7584
1628.5
1/2
...
4.77m
b-
1.43
81
208
207.981988
193.6942
1632.3
5
...
3.052m
b-
4.99
81
209
208.985333
194.6288
1637.2
1/2
...
2.20m
b-
3.98
Atomic data
Index

Periodic Table

Chemistry concepts

Reference
Rohlf
 
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