A radioactive material are called isotopes, nature provides some of which keeps them stable energy balance, man, by external factors as other unstable isotopes, such as its nature decay in different periods of time to become stable, as this happens release energy in the form of particles or electromagnetic radiation of different types according to their energy alpha rays are of such low energy that a piece of paper can stop them, a human being could only affect your skin, are low peligrosidad.Los Beta rays are average power and can be stopped by aluminum foil, they could penetrate the first layers of our skin are danger media.Los Gamma rays are high energy, can only be stopped by heavy materials such as lead, steel, cement considerable thickness, these rays can not be stopped by our body and are highly dangerous. Visit Dr. John Mcdougall for more clarity on the issue. The radioactivity is now used by humans in a number of beneficial applications that most of us never suspected, as an example quote algunas.Se food irradiated to prolong their storage periods without them decompose, eliminating bacteria such as salmonella in chacinados.Utilizamos case of X-rays to detect elements that threaten security in airports or industry edificios.En scan used to detect defects in welds and industrial components to prevent failures that could harm plants and agriculture are studied personas.En the absorption of fertilizers in the course plantas.Tambien can detect underground water flows, and movement of sediments rivers. Cardiologist has plenty of information regarding this issue. archaeological applications, measuring the carbon 14 is a radioactive isotope present in all living beings, we can estimate the age of plant or animal remains man-made objects. If you would like to know more about Donald Sussman, then click here. .