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Chemical element with atomic number 86 (Rn)
Radon is a chemical element; it has symbol Rn and atomic number 86. It is a radioactive noble gas and is colorless and odorless. Of the three naturally
Radon
Topics referred to by the same term
buildings Radon may also refer to: Radon, Orne, a town in France Johann Radon, Austrian mathematician Radon transform, in mathematics Radon measure, in
Radon_(disambiguation)
Expressing a measure as an integral of another
In mathematics, the Radon–Nikodym theorem, named after Johann Radon and Otto M. Nikodym, is a result in measure theory that expresses the relationship
Radon–Nikodym_theorem
There are 39 known isotopes of radon (86Rn), from 193Rn to 231Rn; all are radioactive. The most stable isotope is 222Rn with a half-life of 3.8215 days
Isotopes_of_radon
Reducing radon gas levels in buildings
Radon mitigation is any process used to reduce radon gas concentrations in the breathing zones of occupied buildings, or radon from water supplies. Radon
Radon_mitigation
Integral transform in mathematics
In mathematics, the Radon transform is the integral transform which takes a function f defined on the plane to a function Rf defined on the (two-dimensional)
Radon_transform
The health effects of radon are harmful, and include an increased chance of lung cancer. Radon is a radioactive, colorless, odorless, tasteless noble gas
Health_effects_of_radon
Chemical element with atomic number 88 (Ra)
carcinogenic due to the radioactivity of both it and its immediate decay product radon as well as its tendency to accumulate in the bones. Radium, in the form
Radium
Chemical element with atomic number 118 (Og)
oganesson is sometimes known as eka-radon (until the 1960s as eka-emanation, emanation being the old name for radon). In 1979, IUPAC assigned the systematic
Oganesson
Type of mathematical measure
In mathematics (specifically in measure theory), a Radon measure, named after Johann Radon, is a measure on the σ-algebra of Borel sets of a Hausdorff
Radon_measure
WHO initiative to reduce risk of lung cancer
The International Radon Project (IRP) is a World Health Organization initiative to reduce the lung cancer risk around the world. The IRP released their
International_Radon_Project
Most stable isotope of radon
Radon-222 (222Rn, Rn-222, historically also radium emanation) is the most stable isotope of radon, with a half-life of 3.82146 days. It is an intermediate
Radon-222
Fictional monster, or kaiju
Rodan (Japanese: ラドン, Hepburn: Radon) is a giant pteranodon-like monster, or daikaijū, which first appeared in the eponymous 1956 film, directed by Ishirō
Rodan
Austrian mathematician (1887–1956)
Johann Karl August Radon ([ˈʁaːdɔn]; 16 December 1887 – 25 May 1956) was an Austrian mathematician. His doctoral dissertation was on the calculus of variations
Johann_Radon
Men's prison in Princetown, England
His Majesty's Prison Service. The prison closed temporarily in 2024 for radon mitigation and investigation works. Dartmoor Prison was given Grade II heritage
HM_Prison_Dartmoor
Group of low-reactive, gaseous chemical elements
periodic table: helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn) and, in some cases, oganesson (Og). Under standard conditions, the
Noble_gas
A radon storm is a day-long episode of increased atmospheric radon concentration due to moving air masses. In Antarctica and over the Southern Ocean, they
Radon_storm
Japanese light novel series
he can enter freely, but others require his permission to enter. Radon (ラードーン, Rādōn) Voiced by: Tomokazu Sugita (Dragon form), Rie Kugimiya (Human form)
I'm a Noble on the Brink of Ruin, So I Might as Well Try Mastering Magic
I'm_a_Noble_on_the_Brink_of_Ruin,_So_I_Might_as_Well_Try_Mastering_Magic
2010 American television sitcom
for Blue Mountain State and a former NFL player. Radon Randell (Kennedy) (Starring Season 2) : Radon was the new freshman starting quarterback from Detroit
Blue_Mountain_State
Theorem in geometry about convex sets
In geometry, Radon's theorem on convex sets, published by Johann Radon in 1921, states that: Any set of d + 2 points in Rd can be partitioned into two
Radon's_theorem
Significant contributors to environmental radioactivity
Radium and radon are important contributors to environmental radioactivity. Radon occurs naturally as a result of decay of radioactive elements in soil
Radium and radon in the environment
Radium_and_radon_in_the_environment
The Radon–Riesz property is a mathematical property for normed spaces that helps ensure convergence in norm. Given two assumptions (essentially weak convergence
Radon–Riesz_property
Measure of ionizing radiation in the environment
environmental radioactivity from naturally occurring radioactive materials (such as radon and radium), as well as man-made medical X-rays, fallout from nuclear weapons
Background_radiation
Chemical compound
Radon difluoride (RnF 2) is a compound of radon, a radioactive noble gas. Radon reacts readily with fluorine to form a solid compound, but this decomposes
Radon_difluoride
Polish modular assault rifle and variants
manufactured by FB "Łucznik" Radom. Early prototypes were known as the MSBS Radon. The MSBS Grot was developed in two different configurations: MSBS Grot
FB_MSBS_Grot
Concept in topology
on a Radon space is also a Radon measure. In particular a separable complete metric space (M, d) is a Radon space. Every Suslin space is a Radon space
Polish_space
Chemical compound
Radon hexafluoride is a binary chemical compound of radon and fluorine with the chemical formula RnF 6. This is still a hypothetical compound that has
Radon_hexafluoride
Any chemical compound having at least one radon atom in its structure
Radon compounds are chemical compounds formed by the element radon (Rn). Radon is a noble gas, i.e. a zero-valence element, and is chemically not very
Radon_compounds
Malignant tumor characterized by uncontrolled cell growth in lung tissue
classified radon as "carcinogenic to humans" in 1988. In 1956, a study revealed radon in Swedish residences. Over the following decades, high radon concentrations
Lung_cancer
Chemical element with atomic number 87 (Fr)
astatine). Francium's isotopes decay quickly into astatine, radium, and radon. The electronic structure of a francium atom is [Rn] 7s1; thus, the element
Francium
American actor
an American actor and rapper. In television, he is known for portraying Radon Randell in the Spike sports comedy series Blue Mountain State and "U-Turn"
Page_Kennedy
Chemical element with atomic number 84 (Po)
Sv. The general population is exposed to small amounts of polonium as a radon daughter in indoor air; the isotopes 214Po and 218Po are thought to cause
Polonium
Concept in mathematics
the Bochner integral is that the Radon–Nikodym theorem fails to hold in general, and instead is a property (the Radon–Nikodym property) defining an important
Bochner_integral
Machine to increase pressure of gas by reducing its volume
ventilation Radiant heating and cooling Radiant cooling Radiant heating Radon mitigation Raised floor Refrigeration Renewable heat Room air distribution
Compressor
Adam Radoń (born July 8, 1971, in Brodnica) is a graphic designer, cultural manager, and long-time director of the International Festival of Comics and
Adam_Radoń
Integral transform
Funk transform (also known as Minkowski–Funk transform, Funk–Radon transform or spherical Radon transform) is an integral transform defined by integrating
Funk_transform
How many linearly independent smooth nowhere-zero vector fields can be on an n-sphere
using Clifford algebras, that if ρ ( n ) {\displaystyle \rho (n)} is the Radon-Hurwitz number of the n-sphere (definition below), then there were at least
Vector_fields_on_spheres
1956 film by Ishirō Honda
Rodan (Japanese: 空の大怪獣 ラドン, Hepburn: Sora no Daikaijū Radon; lit. 'Giant Monster of the Sky Radon') is a 1956 Japanese kaiju film directed by Ishirō Honda
Rodan_(film)
Part of Écouves in Normandy, France
Radon (French pronunciation: [ʁadɔ̃] ) is a former commune in the Orne department in north-western France. On 1 January 2016, it was merged into the new
Radon,_Orne
Village in British Columbia, Canada
when an analysis of the water showed that it contained small traces of radon which is a decay product of radium. The radiation dosage from bathing in
Radium Hot Springs, British Columbia
Radium_Hot_Springs,_British_Columbia
Species of short-tailed whip-scorpion
Attenuizomus radon is a species of schizomid arachnid (commonly known as a short-tailed whip-scorpion) in the Hubbardiidae family. It is endemic to Australia
Attenuizomus_radon
Tabular arrangement of the chemical elements
mercury) follows, and finally six main-group elements (thallium through radon) complete the period. From lutetium onwards the 4f orbitals are in the core
Periodic_table
Unproven hypothesis regarding low doses of ionizing radiation on health
an average annual dose from terrestrial and cosmic radiation, excluding radon which primarily doses the lung). There is limited evidence that exposures
Radiation_hormesis
Estimate object properties from a finite number of projections
The mathematical basis for tomographic imaging was laid down by Johann Radon. A notable example of applications is the reconstruction of computed tomography
Tomographic_reconstruction
Lebesgue-Stieltjes integration
Joannes Stieltjes, are also known as Lebesgue–Radon integrals or just Radon integrals, after Johann Radon, to whom much of the theory is due. They find
Lebesgue–Stieltjes integration
Lebesgue–Stieltjes_integration
Isotope of radium
common naturally occurring isotope of uranium. It undergoes alpha decay to radon-222, which is also radioactive; the decay chain ultimately terminates at
Radium-226
Air quality within and around buildings and structures
include secondhand tobacco smoke, air pollutants from indoor combustion, radon, molds and other allergens, carbon monoxide, volatile organic compounds
Indoor_air_quality
The effects of natural cosmic radiation, radioactive substances such as radon and radium found in the environment, and the potential health hazards of
History of radiation protection
History_of_radiation_protection
Measurement of absorbed ionizing radiation
and any collateral absorbed dose is monitored, and environmental, such as radon monitoring in buildings. There are several ways of measuring absorbed doses
Dosimetry
Czech canoeist
Jaroslav Radoň (Czech pronunciation: [ˈjaroslaf ˈradoɲ]; born 3 September 1986 in Kutná Hora) is a Czech sprint canoeist. At the 2012 Summer Olympics
Jaroslav_Radoň
Instrument dials painted with radium-based paint
shown by studies of the Radium Girls. Decaying radium also produces the gas radon, recognized as the second leading cause of lung cancer in the United States
Radium_dial
American amateur golfer (1880–1932)
Times. April 2, 1932. Retrieved October 1, 2011. "Radium". Health Risks of Radon and Other Internally Deposited Alpha-Emitters: Beir IV. National Academics
Eben_Byers
Quackery that improperly promotes radioactivity as a therapy for illnesses
brilliance". A number of spas that treat visitors with naturally infused radon water from the local hills were founded in 1906 and onwards in Joachimsthal
Radioactive_quackery
Theorem about the intersections of d-dimensional convex sets
but not published by him until 1923, by which time alternative proofs by Radon (1921) and König (1922) had already appeared. Helly's theorem gave rise
Helly's_theorem
Polish mathematician (1887-1974)
work was his contribution to the development of the Lebesgue–Radon–Nikodym integral (see Radon–Nikodym theorem). His work in measure theory led him to an
Otto_M._Nikodym
Row 6 of the periodic table
tied for the most with period 7, beginning with caesium and ending with radon. Lead is currently the last stable element; all subsequent elements are
Period_6_element
Index of chemical compounds with the same name
radon trioxide: these may have been RnF4, RnF6, or both. It is likely that the difficulty in identifying higher fluorides of radon stems from radon being
Hexafluoride
Chemical element with atomic number 85 (At)
hours or less, decaying into other astatine isotopes, bismuth, polonium, or radon. Most of its isotopes are very unstable, with half-lives of seconds or less
Astatine
Form of continuity for functions
different directions. The usual derivative of a function is related to the Radon–Nikodym derivative, or density, of a measure. We have the following chains
Absolute_continuity
Japanese neutrino observatory
degasifier (MD) removes radon dissolved in water, and the measured removal efficiency for radon is about 83%. The concentration of radon gases is measured by
Super-Kamiokande
Cancer caused by ionizing radiation exposure
accidents, and many others. Some major contributors are discussed below. Radon is responsible for the worldwide majority of the mean public exposure to
Radiation-induced_cancer
Subject in mathematics
infinite-dimensional spaces. In fact, there is no nontrivial left-invariant Radon measure on any Hausdorff, non-locally compact topological group and infinite-dimensional
Measure theory in topological vector spaces
Measure_theory_in_topological_vector_spaces
His proof extends to a field of any characteristic except 2. The "Hurwitz–Radon" problem is that of finding admissible triples of the form ( r , n , n )
Hurwitz_problem
German physicist and first to discover radioactive substance emitted from radon
for his discovery that radium emits a radioactive substance, later named radon. Dorn was born in Guttstadt (Dobre Miasto), Province of Prussia (nowadays
Friedrich_Ernst_Dorn
Process of extraction of uranium ore from the ground
miners to radon as uranium (and its decay product radon) are often found in and near coal deposits and can accumulate underground as radon is denser than
Uranium_mining
Natural satellite orbiting Earth
of Mercury and Io); helium-4 and neon from the solar wind; and argon-40, radon-222, and polonium-210, outgassed after their creation by radioactive decay
Moon
was nicknamed by her aides as the 'Department for Instagramming Truss'. Radon Liz, a nickname used by opponents, with the explanation that "she’s a gas
List of nicknames of prime ministers of the United Kingdom
List_of_nicknames_of_prime_ministers_of_the_United_Kingdom
Musical artist
and noise collective Radon disproved the rumors by contacting Mackay and arranging to release his first solo recordings. Radon released the "Death City"
Steve_Mackay
Manmade calcium sulfate hydrate by-product
uranium (U) and thorium (Th), and their daughter isotopes radium (Ra), radon (Rn) and polonium (Po). On the other hand, it includes several valuable
Phosphogypsum
to measure radon gas concentrations. Radon itself is an inert gas. Its danger lies in the fact that it undergoes radioactive decay. The radon decay products
Lucas_cell
Medical diagnostic method
are effectively the Radon transformation of the structure of the object. Reconstruction essentially involves solving the inverse Radon transformation. In
Operation of computed tomography
Operation_of_computed_tomography
Many years ago radium-226 and radon-222 were used as gamma-ray sources for industrial radiography: for instance, a radon-222 source was used to examine
Commonly used gamma-emitting isotopes
Commonly_used_gamma-emitting_isotopes
Harmful high-frequency radiation
radiation is radon gas, which seeps continuously from bedrock but can, because of its high density, accumulate in poorly ventilated houses. Radon-222 is a
Ionizing_radiation
Polish-French physicist and chemist (1867–1934)
a colourless, radioactive gas given off by radium, later identified as radon, to be used for sterilising infected tissue. She provided the radium from
Marie_Curie
Enclosed space below a structure that is too low to stand in
ground and the wooden parts of a home and, with adequate sealing, help with radon mitigation. Crawl spaces are also sometimes used for storage of items such
Crawl_space
Gas made of free atoms
pressure include all the noble gases (helium, neon, argon, krypton, xenon, and radon), though all chemical elements will be monatomic in the gas phase at sufficiently
Monatomic_gas
Theorem in mathematical measure theory
decomposition theorem can be refined in a number of ways. First, as the Lebesgue–Radon–Nikodym theorem. That is, let ( Ω , Σ ) {\displaystyle (\Omega ,\Sigma )}
Lebesgue's decomposition theorem
Lebesgue's_decomposition_theorem
Geometric object that represents a "cake"
In the theory of fair cake-cutting, the Radon–Nikodym set (RNS) is a geometric object that represents a cake, based on how different people evaluate the
Radon–Nikodym_set
Type of igneous rock
into soils over granite can become a trap for radon gas, which is formed by the decay of uranium. Radon gas poses significant health concerns and is the
Granite
Species of spider
Argiope radon is a species of orb web spider native to Australia. It is found in tropical areas of the Northern Territory, Western Australia and Queensland
Argiope_radon
Agent directly involved in causing cancer
exposures to carcinogens including ultraviolet radiation from the sun, radon gas emitted in residential basements, environmental contaminants such as
Carcinogen
Concept in mathematics
transformations often take the form of integral transforms such as the Radon transform and its generalizations. Integral geometry as such first emerged
Integral_geometry
German video game developer
Bigpoint GmbH is a German video game developer. The company develops stand-alone browser-based games as well as social network games. Bigpoint has over
Bigpoint
Chemical compound containing a noble gas element
relatively reactive krypton (ionisation energy 14.0 eV), xenon (12.1 eV), and radon (10.7 eV) on one side, and the very unreactive argon (15.8 eV), neon (21
Noble_gas_compound
Disused uranium mine in Cornwall
abandoned metalliferous mines in Devon and Cornwall , UK : radon hazards and geology". International Radon Symposium: 94–105. S2CID 15660281. Gillmore, Gavin
South_Terras_mine
Non-associative algebras with positive-definite quadratic form
Hurwitz in 1898. It is a special case of the Hurwitz problem, solved also in Radon (1922). Subsequent proofs of the restrictions on the dimension have been
Hurwitz's theorem (composition algebras)
Hurwitz's_theorem_(composition_algebras)
In measure theory, a radonifying operator (ultimately named after Johann Radon) between measurable spaces is one that takes a cylinder set measure (CSM)
Radonifying_operator
Abbreviations used in chemistry
deuterium (D) and tritium (T), are still in use today, as is thoron (Tn) for radon-220 (though not actinon; usually instead referring to a generic actinide)
Chemical_symbol
10−6 seconds lead-196m2 <1 polonium-192m ~1 radon-210m3 1.04 thorium-219 1.05 polonium-206m2 1.05 radon-210m2 1.06 curium-243m 1.08 actinium-218 1.08
List of radioactive nuclides by half-life
List_of_radioactive_nuclides_by_half-life
Gaseous materials produced for use in industry
(1868) fluorine (1886), argon (1894), krypton, neon and xenon (1898) and radon (1899). Carbon dioxide, hydrogen, nitrous oxide, oxygen, ammonia, chlorine
Industrial_gas
Type of radiation therapy
technique for extracting radon-222 gas from radium sulfate solutions. Solutions containing 1 gram of radium were "milked" to create radon "seeds" of about 20
Brachytherapy
Concept in measure theory
then Y {\displaystyle Y} is said to be a separable random variable or a Radon random variable. Another equivalent criterion of the tightness of a collection
Tightness_of_measures
Heinrich Mache. It was defined as the quantity of radon (ignoring its daughter isotopes; in practice, mostly radon-222) per litre of air which ionises a sustained
Mache_(unit)
History of radiation-based medical imaging
Johann Radon in 1917 who worked on integral transforms without having a certain practical application in mind. He became the eponym of the Radon transform
History of computed tomography
History_of_computed_tomography
Method of detecting shapes within images
algorithm for computing the Hough transform. Mathematically it is simply the Radon transform in the plane, known since at least 1917, but the Hough transform
Hough_transform
Thermal springs in Kazakhstan
monument of national significance- a relic grove of Sogdian ash and hot radon springs near Chunja village. N. Starikov founded the village as a Cossack
Chunja_hot_springs
the products of the decay chains of the former two, such as radium and radon. Produced water discharges and spills are a good example of entering NORMs
Naturally occurring radioactive material
Naturally_occurring_radioactive_material
Sedimentary geologic unit in Santa Barbara County, California
Landfill, and in road cuts. The geologic unit is notorious as a source of radon gas related to its high uranium content, released by radioactive decay.
Rincon_Formation
American female radiation poisoning victims (1917–1978)
likely to cause cancer of the bone as the shorter half-life of radon-220 compared with radon-222 causes the daughter nuclides of radium-228 to deliver a
Radium_Girls
Theorem
the Radon–Nikodym theorem. The usual density operator of states on the matrix algebras with respect to the standard trace is nothing but the Radon–Nikodym
Stinespring_dilation_theorem
RADON
RADON
RADON
RADON
Boy/Male
Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Mythological, Oriya, Sanskrit, Tamil, Telugu
God of War; Elder Son of Lord Shiva
Girl/Female
Norse
Half beautiful.
Boy/Male
American, Australian, British, English
From the Hill-slope Estate
Surname or Lastname
English
English : topographic name from Middle English broke ‘brook’ + weye ‘way’, ‘road’.
Girl/Female
Indian
Joyful or pleasurable or Happy girl
Girl/Female
Tamil
Omkareshwari | ஓமகாரேஷà¯à®µà®°à¯€
Goddess Parvati, Gauri
Boy/Male
Hindu, Indian
Wife of Shiva
Surname or Lastname
English (Yorkshire)
English (Yorkshire) : nickname for a truthful person, or perhaps rather for someone who was in the habit of insisting repeatedly on the truth of the stories he told, from Middle English verite ‘truth(fulness)’ (Old French verité). The surname may sometimes have been acquired by someone who had acted the part of the personified quality of Truth in a mystery play or pageant.
Female
English
Variant spelling of English Lauren, LAURENE means "of Laurentum."
Male
German
From the Germanic word burg, BURK means "castle, fort, protection." Used as a short form of longer names containing the same element.
RADON
RADON
RADON
RADON
RADON