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protactinium | A Wisdom Archive on protactinium | | protactinium A selection of articles related to protactinium | |
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protactinium, Protactinium, Protactinium - Applications, Protactinium - Biological Role, Protactinium - Compounds, Protactinium - History, Protactinium - Isotopes, Protactinium - Notable Characteristics, Protactinium - Occurrence, Protactinium - Precautions
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| ARTICLES RELATED TO protactinium | | | |  protactinium: Encyclopedia II - Thorium - HistoryThorium was discovered in 1828 by the Swedish chemist Jöns Jakob Berzelius, who named it after Thor, the Norse god of thunder. The metal had virtually no uses until the invention of the lantern mantle in 1885.
The name ionium was given early in the study of radioactive elements to the 230Th isotope produced in the decay chain of 238U before it was realized that ionium and thorium were chemically identical. The symbol Io ...
See also:Thorium, Thorium - Notable characteristics, Thorium - Applications, Thorium - History, Thorium - Occurrence, Thorium - Thorium as a nuclear fuel, Thorium - Isotopes, Thorium - Precautions, Thorium - Reference Read more here: » Thorium: Encyclopedia II - Thorium - History |
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| | | | | protactinium: Encyclopedia II - Radiometric dating - Short-range dating techniques There are a number of other dating techniques that have short ranges and are so used for historical or archaeological studies. One of the best-known is the carbon-14 (C14) radiometric technique.
Carbon-14 is a radioactive isotope of carbon, with a half-life of 5,730 years (very short compared with the above). In other radiometric dating methods, the heavy parent isotopes were synthesized in the explosions of massive stars that scattered materials through the Galaxy, to be formed into planets and other stars. The parent isotopes have been decaying since that time, and so ...
See also:Radiometric dating, Radiometric dating - Types of radiometric dating, Radiometric dating - Fundamentals of radiometric dating, Radiometric dating - Limitation of techniques, Radiometric dating - Modern dating techniques, Radiometric dating - Short-range dating techniques, Radiometric dating - Dating with shortlived extinct radionuclides, Radiometric dating - Notes Read more here: » Radiometric dating: Encyclopedia II - Radiometric dating - Short-range dating techniques |
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| | | | | protactinium: Encyclopedia II - Radon - Applications In the United States and Europe there are a few "radon spas," where people sit for minutes or hours in a high-radon atmosphere in the belief that airborne radiation will invigorate or energize them. There is no scientific evidence for this belief, nor any known biological mechanism by which such an effect could occur.
Because of radon's rapid loss to air, radon is used in hydrologic research that studies the interaction between ground water, streams and rivers. Any significant concentration of radon in a stream or river is a good indicator that t ...
See also:Radon, Radon - Notable characteristics, Radon - Applications, Radon - History, Radon - Occurrence, Radon - Compounds, Radon - Isotopes, Radon - Precautions, Radon - Radon therapy Read more here: » Radon: Encyclopedia II - Radon - Applications |
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