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  2. Radon - Wikipedia

    en.wikipedia.org/wiki/Radon

    Radon is a member of the zero-valence elements that are called noble gases, and is chemically not very reactive. The 3.8-day half-life of 222 Rn makes it useful in physical sciences as a natural tracer. Because radon is a gas at standard conditions, unlike its decay-chain parents, it can readily be extracted from them for research. [20]

  3. Radium and radon in the environment - Wikipedia

    en.wikipedia.org/wiki/Radium_and_radon_in_the...

    In a working mine, the radon level can be controlled by ventilation, sealing off old workings and controlling the water in the mine. The level in a mine can go up when a mine is abandoned; it can reach a level which can cause the skin to become red (a mild radiation burn). The radon levels in some of the mines can reach 400 to 700 kBq m −3. [17]

  4. Officials highlight the dangers of radon - AOL

    www.aol.com/news/officials-highlight-dangers...

    Radon occurs naturally when uranium in soil or rock breaks down to form radium, which then turns into radon gas. ... color or taste, radon is a slow killer. ... the only way to know is to do a ...

  5. Radon-222 - Wikipedia

    en.wikipedia.org/wiki/Radon-222

    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 .

  6. Radium - Wikipedia

    en.wikipedia.org/wiki/Radium

    226 Ra is the most stable isotope of radium and is the last isotope in the (4 n + 2) decay chain of uranium-238 with a half-life of over a millennium; it makes up almost all of natural radium. Its immediate decay product is the dense radioactive noble gas radon (specifically the isotope 222 Rn ), which is responsible for much of the danger of ...

  7. 10 weird things that can kill you almost instantly - AOL

    www.aol.com/news/2016-03-13-10-weird-things-that...

    When that happens, the fish immediately release venom into whatever disturbed it. Effects are fast acting and can include heart stoppage, seizures, and paralysis. Number 8.Cleaning the toilet. No ...

  8. Health effects of radon - Wikipedia

    en.wikipedia.org/wiki/Health_effects_of_radon

    Average radiation doses received in Germany. Radon accounts for half of the background dose; and medical doses reach the same levels as background dose. The largest natural contributor to public radiation dose is radon, a naturally occurring, radioactive gas found in soil and rock, [65] which comprises approximately 55% of the annual background ...

  9. What is the red fire retardant dropped by planes to fight LA ...

    www.aol.com/red-fire-retardant-dropped-planes...

    The red color of the fire retardant is caused by the chemical component iron oxide, commonly known as rust. ... It is expected to naturally lose its color within months. How does fire retardant work?