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                          2. ▸▸
                            • 🇬🇧 Radon
                            • 🇨🇳 氡
                            • 🇳🇱 Radon
                            • 🇫🇷 Radon
                            • 🇩🇪 Radon
                            • 🇮🇱 רדון
                            • 🇮🇹 Radon (emanio)
                            • 🇯🇵 ラドン
                            • 🇵🇹 Radão
                            • 🇷🇺 Радон
                            • 🇪🇸 Radón
                            • 🇸🇪 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 '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

                            网络斗地主下载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

                            网络斗地主下载 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

                            网络斗地主下载 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 (226网络斗地主下载Ra, half life 1599 years).

                            226Ra → 222Rn + 4He

                            This method gives 0.64 cm3网络斗地主下载 of radon gas per gram of radium per month.

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