Radon

Symbol RnAtomic number 86
Atomic mass
222
 Thermal conductivity
0.000036
Atomic radius
1.34
 Covalent radius
...
Density
0.00991
 Atomic volume
50.5
Melting point
202
 Oxidation states
...
Boiling point
211
 Stable isotopes
0
Heat of vapor.
16.4
 Electronegativity
...
Heat of fusion
2.89
 First ionization
10.748
Specific heat
0.09
 Electrical conduct.
...
Electron configuration

General descriptionNuclear data
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Radon

Radon is a noble gas which is produced steadily by the radioactive decay of radium.

Radon is radioactive, and has been found useful in localized radiation therapy for cancer. Radon is pumped into a small gold tube, which is then placed at the center of the tissue to be treated. With it's 3.8 day halflife, the radiation diminishes rapidly and disposal is not a big problem. The gold capsule blocks the alpha emissions from the daughter products of radon, so that the gamma rays only are used therapeutically.

Radon has received a great deal of publicity as a possible long-term radiation hazard in some buildings where radon from the earth may enter the ground floor of the buildings.

Atomic dataNuclear data
 Index

Periodic Table

Chemistry concepts

Reference
Pauling
Ch. 5
 
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Radon Nuclear Data

Z
A
Atomic
Mass (u)
Nuclear
Mass(GeV/c2)
Binding
Energy(MeV)
Spin
Natural
Abund.
Half-life
Decay
Q
MeV
86
210
209.989669
195.5618
1637.3
0
...
2.4h
a,EC
6.16,2.37
86
211
210.990575
196.4941
1644.6
1/2
...
14.6h
b+,a
2.89,5.96
86
212
211.990697
197.4257
1652.5
0
...
24h
a
6.39
86
213
212.996347
198.3625
1655.3
9/2
...
25ms
a
8.24
86
214
213.995339
199.2931
1664.3
0
...
0.27ms
a
9.21
86
219
219.009478
203.9637
1691.5
5/2
...
3.96s
a
6.95
86
220
220.011368
204.8970
1697.8
0
...
55.6s
a
6.40
86
222
222.017571
206.7658
1708.2
0
...
3.823d
a
5.59
Atomic data
Index

Periodic Table

Chemistry concepts

Reference
Rohlf
 
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