Radon Facts Enjoy these interesting radon facts and learn more about the properties of this radioactive noble gas. Being one of the heaviest gases, radon tends to accumulate in low lying areas such as house basements, but is a gas that is very hard to detect.
Extrapolation down the noble gas group would suggest also the possible existence of RnO, RnO2, and RnOF4, as well as the first chemically stable noble gas chlorides RnCl2 and RnCl4, but none of these have yet been found.
Isotopes of radon The radium or uranium series. Radon has no stable isotopes. Thirty-seven radioactive isotopes have been characterized, with atomic masses ranging from to Three other radon isotopes have a half-life of over an hour: The Rn isotope is a natural decay product of the most stable thorium isotope Thand is commonly referred to as thoron.
It has a half-life of Similarly, Rn is derived from the most stable isotope of actinium Ac —named "actinon"—and is an alpha emitter with a half-life of 3. Its four first products excluding marginal decay schemes are very short-lived, meaning that the corresponding disintegrations are indicative of the initial radon distribution.
Its decay goes through the following sequence: The radon equilibrium factor  is the ratio between the activity of all short-period radon progenies which are responsible for most of radon's biological effectsand the activity that would be at equilibrium with the radon parent.
If a closed volume is constantly supplied with radon, the concentration of short-lived isotopes will increase until an equilibrium is reached where the rate of decay of each decay product will equal that of the radon itself. The equilibrium factor is 1 when both activities are equal, meaning that the decay products have stayed close to the radon parent long enough for the equilibrium to be reached, within a couple of hours.
A detailed explanation of WL is given in Concentration Units. Because of their electrostatic charge, radon progenies adhere to surfaces or dust particles, whereas gaseous radon does not. Attachment removes them from the air, usually causing the equilibrium factor in the atmosphere to be less than one.
The equilibrium factor is also lowered by air circulation or air filtration devices, and is increased by airborne dust particles, including cigarette smoke. In high concentrations, airborne radon isotopes contribute significantly to human health risk.
The equilibrium factor found in epidemiological studies is 0. M is a capillary tube where approximately 0. Radon mixed with hydrogen entered the evacuated system through siphon A; mercury is shown in black. Radon was the fifth radioactive element to be discovered, in by Ernest Rutherford and Robert B.
Owens after uranium, thorium, radium and polonium. Owens and Ernest Rutherford, at McGill University in Montrealnoticed variations when trying to measure radiation from thorium oxide. InRutherford and Harriet Brooks demonstrated that the emanations are radioactive, but credited the Curies for the discovery of the element.Radon is the product of the decay of other unstable, radioactive elements such as radium, thorium and actinium.
The colourless, odourless, tasteless gas can be isolated from these sources but soon decays as it has no stable isotopes.
Clicking on an element brings up a list of general properties and data, an introduction to the properties of an element radon and information on its discovery, history, uses, geologic. Other sections include matter, elements, reactions, and biochemistry A chemical element is a species of atoms having the same number of protons in their atomic nuclei (that is, the same atomic number, or Z).
Radon is a chemical element, its symbol is Rn and it has an atomic number of Radon is a radioactive noble gas, it is colorless, odorless and tasteless.
When radon is cooled below its freezing point of −96 °F (−71 °C) it emits a bright radiating luminescence that starts out yellow and as the temperature lowers becomes a orangey red color.
It looks like you've lost connection to our server. Please check your internet connection or reload this page. This WebElements periodic table page contains physical properties for the element radon.
Radon is a naturally radioactive element with atomic symbol Rn, and atomic number It is a member of the noble gas family found in soil, and is released during the decay of RADIUM.