Hevesy, George Charles

Also written as Georg Karl von Hevesy, Georg Hevesy, George Charles de Hevesy, George de Hevesy, George Hevesy... 

There are a number of tracers that have been used to help understand chemical reactions and interactions. Historically, development of modem tracer methods began with the pioneering work of the Hungarian physical chemist, George Charles de Hevesy, in the early 1900s. De Hevesy s work focused on the use of radioactive tracers to study chemical processes, for which he was awarded the Nobel Prize in Chemistry in 1943. Radioactive tracers, also known as radioactive labels, are based on the use of a given radioisotope. However, it is important to note that there are also isotopic tracers (or isotopic labels). Isotopes are forms of a chemical element with different atomic mass, which have nuclei with the same atomic number (i.e. number of protons) but different numbers of neutrons. Examples include H, " C, and which are radioactive forms of stable elements... 

In 1923 Dutch physicist Dirk Coster (1889—1950) and Hungarian chemist George Charles de Hevesy (1889—1966) found element 72 by X-ray analysis. The element was present in a piece of Norwegian zircon. Zircon also contains the mineral zirconium. 

Dutch physicist Dirk Coster and Hungarian chemist George Charles de Hevesy rediscover hafnium and are generally recognized as discoverers of the element. 

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