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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 occurring radon isotopes, only radon-222 has a sufficiently long half-life (3.825 days) for it to be released from the soil and rock where it is generated.
The health effects of radon are harmful, and include an increased chance of lung cancer. Radon is a radioactive, colorless, odorless, tasteless noble gas, which has been studied by a number of scientific and medical bodies for its effects on health. A naturally-occurring gas formed as a decay product of radium, radon is one of the densest ...
Radon mitigation is any process used to reduce radon gas concentrations in the breathing zones of occupied buildings, or radon from water supplies. Radon is a significant contributor to environmental radioactivity and indoor air pollution. Exposure to radon can cause serious health problems such as lung cancer.
Siren 17 sailboat with trailer. The Siren 17 is a small recreational keelboat, built predominantly of fibreglass and foam flotation, with mahogany wood trim. It has a fractional sloop rig, with a hinged mast step and jiffy-reefing, a transom-hung rudder and a retractable centreboard keel. The cockpit is self-bailing and 7 ft (2.1 m) long.
For one Pudel Pointer named Tess, it's barking! This vocal dog is used to spending lots of time with Mom, author Abby Jimenez, whether lounging in the backyard or asking to play. It was only ...
Complete table of nuclides. Radon-222 ( 222 Rn, Rn-222, historically radium emanation or radon) is the most stable isotope of radon, with a half-life of approximately 3.8 days. It is transient in the decay chain of primordial uranium-238 and is the immediate decay product of radium-226. Radon-222 was first observed in 1899, and was identified ...
As the Eiffel Tower shimmered with laser lights, a tune from the man known as the French Disco King set the stage for the final leg of the Olympics opening ceremony. This 1977 classic proved that ...
Emergency vehicle equipment. An ambulance with two red revolving lights ( beacons) mounted above two flashing red lights, with two speakers between for the vehicle's electronic siren. Also seen are two antennae; the one seen between the two speakers is for a two-way radio, while the one seen in front of the flashing light on the left is ...