โ–ธโ–ธ
  • ๐Ÿ‡ฌ๐Ÿ‡ง Radon
  • ๐Ÿ‡จ๐Ÿ‡ณ ๆฐก
  • ๐Ÿ‡ณ๐Ÿ‡ฑ Radon
  • ๐Ÿ‡ซ๐Ÿ‡ท Radon
  • ๐Ÿ‡ฉ๐Ÿ‡ช Radon
  • ๐Ÿ‡ฎ๐Ÿ‡ฑ ืจื“ื•ืŸ
  • ๐Ÿ‡ฎ๐Ÿ‡น Radon (emanio)
  • ๐Ÿ‡ฏ๐Ÿ‡ต ใƒฉใƒ‰ใƒณ
  • ๐Ÿ‡ต๐Ÿ‡น Radão
  • ๐Ÿ‡ท๐Ÿ‡บ ะ ะฐะดะพะฝ
  • ๐Ÿ‡ช๐Ÿ‡ธ Radón
  • ๐Ÿ‡ธ๐Ÿ‡ช Radon

Radon: the essentials

Radon atoms have 86 electrons and the shell structure is 2.8.18.32.18.8. The ground state electronic configuration of neutral radon is [Xe].4f14.5d10.6s2.6p6 and the term symbol of radon is 1S0.

Radon: description  

At ordinary temperatures radon is a colourless gas. When cooled below the freezing point, radon exhibits a brilliant phosphorescence which becomes yellow as the temperature is lowered and orange-red at the temperature of liquid air. The main hazard is from inhalation of the element and its decay products which are collected on dust in the air. Recently, radon buildup in homes from the surrounding soil and rocks has become a safety issue and some areas around the world test homes for radon gas. It is the heaviest known gas. Radon is present in some spring waters.

radon
Radon is a decay product of the radium salts used in the luminous paint of the numerals. In this 1950's clock, the glass casing has accumulated 10-16 gram) of radon. Image adapted with permission from Prof James Marshall's (U. North Texas, USA) Walking Tour of the elements CD.

Radon: physical properties

More physical properties...

Radon: heat properties

More thermochemical properties...

Radon: atom sizes

More atomc size properties...

Radon: electronegativities

More electronegativity properties...

Radon: orbital properties

More orbital properties...

Radon: abundances

More geological data...

Radon: crystal structure

Rn crystal structure
The solid state structure of radon is: bcc (body-centred cubic).

More crystallographic data...

Radon: biological data

Radon has no biological role.

More biological data...

Radon: uses

Uses...

Radon: reactions

Reactions of radon as the element with air, water, halogens, acids, and bases where known.

View reactions of radon...

Radon: binary compounds

Binary compounds with halogens (known as halides), oxygen (known as oxides), hydrogen (known as hydrides), and other compounds of radon where known.

View binary compounds...

Radon: compound properties

Bond strengths; lattice energies of radon halides, hydrides, oxides (where known); and reduction potentials where known.

View compound properties...

Radon: history

Radon was discovered by Friedrich Ernst Dorn in 1900 at Germany. Origin of name: named after "the element radium" (radon was called niton at first, from the Latin word "nitens" meaning "shining".

More history...

Radon: isotopes

Isotope abundances of radon
Isotope abundances of radon with the most intense signal set to 100%.

More isotope and NMR data...

Radon: isolation

Isolation: radon is present to a very small trace extent in the atmosphere and in principle could be obtained as a byproduct from the liquefaction and separation of air. However as only small quantities are ever needed in practice, and because of its short half life (the longest life isotope has a half life of less than 4 days), such quantities as are required are isolated through collection from the radioactive decay of an isotope of radium (226Ra, half life 1599 years).

226Ra → 222Rn + 4He

This method gives 0.64 cm3 of radon gas per gram of radium per month.