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Radiometric Dating
In 1896, French physicist, Henry Becquerel discovered the natural radioactive decay of uranium, opening new vistas in science (Time pp). Roughly a decade later, in 1905, British physicist Lord Rutherford, "after defining the structure of the atom," first suggested the use of radioactivity as a tool for measuring geologic time (Time pp). Then, in 1907, radiochemist B.B. Boltwood, a professor at Yale University, published a list of geologic ages based on radioactivity, and although his "ages" have since been revised, they do show correctly that the duration of geologic time "would be measured in terms of hundreds-to-thousands of millions of years" (Time pp). The next forty years saw a great deal of research concerning the nature and behavior of atoms, thus, leading to the development of nuclear...
The invention of the Mass Spectrometer after World War I, post-1918, led to the discovery of more than two hundred isotopes (Dating pp).
A chemical element consists of atoms with a specific number of protons in their nuclei but different atomic weights owing to variations in the number of neutrons" (Time pp).
Isotopes are atoms of the same element with differing atomic weights (Time pp). "Radioactive decay is a spontaneous process in which an isotope, the parent, loses particles from its nucleus to form an isotope…
Works Cited
Radiometric Dating
http://www.gpc.edu/~pgore/geology/geo102/radio.htm
Radiometric Time Scale
http://pubs.usgs.gov/gip/geotime/radiometric.html
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