de en fr hr it es
Neighborhood
I
53
Xe
54
Cs
55
At
85
Rn
86
Fr
87
Uus
117
Uuo
118
 

 

Periodic table

de  German

Radon

en  English

Radon

fr  French

Radon

hr  Croatian

Radon

it  Italian

Radon

es  Spanish

Radón

 

Rn
Rn
Radon

 

Atomic number:86

Group numbers:18

Period:6

Electronic configuration:[Xe] 4f14 5d10 6s2 6p6

Formal oxidation number:0

Electronegativities:-

Atomic radius / pm:240

Relative atomic mass:[222]

 

Radon was discovered by Robert Bowie Owens and Ernest Rutherford (GB) in 1899. The origin of the name is variation of the name of element radium; radon was called niton at first, from the Latin word nitens meaning shining. It is a colourless, odourless radioactive, heavy, noble gas that is chemically inert and non-flammable but is highly radiotoxic and carcinogen by inhalation. Residential radon testing is relatively simple and while the kit needs to be sent to a lab for processing the results won't require enrolling in college online to read. Radon is formed from the decay of radium in the earths crust. It is used to treat some forms of cancer.

PHYSICAL PROPERTIES

Density / g dm-3:4400 (liquid, b.p.)

 9.73 (gas, 273 K)

Molar volume / cm3mol-1:50.45 (liquid, b.p.)

 22816.03 (gas, 273 K)

Electrical resistivity / μΩcm:- (20 °C)

THERMAL PROPERTIES

Thermal conductivity / W m-1K-1:0.0036

Melting point / °C:-71

Boiling point / °C:-61.7

Heat of fusion / kJ mol-1:2.7

Heat of vaporization / kJ mol-1:18.1

Heat of atomization / kJ mol-1:0

IONIZATION ENERGIES

First ionization energy / kJ mol-1:1037.08

Second ionization energy / kJ mol-1:-

Third ionization energy / kJ mol-1:-

ABUNDANCE OF ELEMENTS

in the atmosphere / ppm:-

in the Earth's crust / ppm:-

in the oceans / ppm:9E-15

CRYSTALLOGRAPHIC DATA

face-centered cubic

Crystal structure:

face-centered cubic

Unit-cell dimensions / pm:

-

Space group:

-

ISOTOPES

IsotopeRelative atomic massMass percent (%)
211Rn210.990585(8)*
222Rn222.017570(3)*

REDUCTION POTENTIALS

Balanced half-reaction Eo / V

 

85 Astatine <=
86 Radon
=> 87 Francium