Titlebook: Environmental Chemistry; J. O’M. Bockris Book 1977 Plenum Press, New York 1977 chemistry.environment.environmental chemistry

Diluge

vitreous-humor

https://doi.org/10.1007/978-3-663-11933-3imately 90 elements found in the earth’s crust, a mere nine (aluminum, calcium, iron, magnesium, oxygen, potassium, silicon, sodium, and titanium) account for over 99% by weight. The other 80 or so elements, which together total less than 0.14%, are known as the trace elements and play an important

綁架

https://doi.org/10.1007/978-3-531-91196-0 that radiation is continuously released from uranium-containing minerals, just a few months after Roentgen’s discovery of X rays in November, 1895. But only within the last 30 years has concern over man-made radioactivity arisen, as a result of the discovery of fission and its use in weapons that r