Home | Links | Contact Us | About Us | Bookmark
Medical Forum Search :
 
   Homepage      News      Health Topics     Health Directories      Medical Forum      Dictionary  
Health Forum    First Aid
Health Discussion Forum

 Has anyone torn their ACL and had surgery?
If you have, what are some good exercises to get the range of motion back? My doctor just told me he wants me to get to a certain point in a week, but not really how. I start physical therapy in ...


 what country has the highest demand for nurses?
...


 what is the way to lose fat% from your stomack.?
...


 what is mesothelioma?
...


 how do you know if you suffer from depression?
i'm 25 and i don't have health insurance, so i can't afford a diagnosis, but i need to know if i'm suffering from depression. i think i have some signs, but i'm not sure if ...


 hey whats the best way to relax and relieve stress from work?
ive been working too much at my job with alot of stress and i need to find some way to get rid of some of it. im pretty sure that everyone knows what i mean by stress at ...


 how long does cocaine stay in your system?
...


 please help me i am so sick!?
my throat hurts really bad is vicks 44 a good medicine and what is something good to drink when all you have are ...


 Are yawns contagious?
...


 WHY ARE SOME PEOPLE SENSETIVE TO CAFFIENE AND OTHERS ARE NOT?
IS THIER SOMETHING IN THE BODY THAT MAKES SOMEONE MORE SENSETIVE AND OTHERS NOT SENSITVE TO CAFFEINE?...


 Chapped or Slippery?
My hands are chapped and I have a great lotion for it, but I never want to apply it because then everything I touch gets slippery and it's so annoying. Any ideas?...


 how can i learn to relax more , get less stressed out?
...


 how many hours of sleep should a 16 year old girl get?
...


 how can I get relief from my neck pain?
...


 Which foods are best for lowering bad cholesterol?
...


 what causes the hiccups?
what causes hiccups??? anyone know.. i was always told its your heart skipping a beat is this true??????...


 I have a question about asthma is there a city in california where you can breath better?
...


 How can I stop a sneeze?
...


 Will using a laptop on your lap make you more prone to being sterile?
This is a real question. I have friends who won't use their laptops on their laps because they think they will be sterile. Is this true or an urban legend?...


 how do i get rid of the pain in my neck and shoulders?
...



will-not-tall-out-of-my-rear-end
what is radon?
                     




hollyjpringle
Rating
A colorless, radioactive, inert gaseous element formed by the radioactive decay of radium. It is used as a radiation source in radiotherapy and to produce neutrons for research. Its most stable isotope is Rn 222 with a half-life of 3.82 days. Atomic number 86; melting point -71°C; boiling point -61.8°C; specific gravity (solid) 4. See table at element.


Trsmd
Radon is a radioactive gas that arises from the natural radioactive decay of radium, which is a natural decay product of uranium. Scientifically, “radon” is known to be radon-222, the most abundant isotope of the element radon. The terms radon and radon-222 are often used interchangeably when referring to the indoor radon issue.



As a noble gas, radon is colorless, odorless and chemically inert and cannot be detected by human senses. Also, since radon is not chemically reactive with most materials, it will move freely as a gas. Radon has a radiological half-life of 3.8 days, and can move substantial distances from its point of origin.



The first four radioactive isotopes formed as radon decays are polonium-218, lead-214, bismuth-214 and polonium-214. They are commonly referred to as “radon daughters” or “radon progeny.” These short-lived isotopes are not gases but are chemically active solids. They are present in any environment where radon is found and, like radon, cannot be detected by human senses.



The earth is the source of all radon gas in our atmosphere. Uranium is a natural part of the earth’s crust. Therefore, radium and radon are also naturally present (as noted above). Since uranium and radium concentrations vary throughout the earth’s crust, radon concentrations will also vary. The amount of radon gas that escapes into the atmosphere is dependent on the depth at which it is formed and the permeability of the surrounding earth. Radon formed in the top 10 meters of soil and rock provides the largest component of radon entering the atmosphere. Because they are metallic particulates, radon daughters formed in the soil will not escape.



The second most important contributor to atmospheric radon is emanation from groundwater. Underground radon is readily carried in groundwater and when this groundwater surfaces, most of the radon is released to the atmosphere.



Other sources of atmospheric radon are very small contributors and are largely due to human activities. For example, there are radium-rich industrial by-products spread upon the earth, and sometimes construction materials are produced from raw materials that contain uranium or radium.



Worldwide, over 2.5 billion curies of radon are emitted annually into the atmosphere. Atmospheric dilution results in a typical outdoor level of between 0.2 and 0.7 picocuries per liter (pCi/l). However, wide variations do exist.


Skinut
It is formed naturally in areas where the bed rock is made up of granite. Cornwall in the UK is an example of an area where there is a lot of Radon gas released naturally - where as here in Buckinghamshire where we have sedimentary chalk under clay there are no radon hotspots.


 Enter Your Message or Comment


User Name:  
User Email:   
Post a comment:







Archive: Forum -Forum1 - Links - 1 - 2
HealthExpertAdvice does not provide medical advice, diagnosis or treatment. 0.014
Copyright (c) 2011 HealthExpertAdvice Thursday, March 21, 2013
Terms of use - Privacy Policy