George Karl von Hevesy (1885 - 1966)

Name: George Karl von Hevesy
DOB: 1885

Died: 1966.
Discoveries: Hafnium in 1922.

Hevesy was born in Budapest,Hungary and naturalized himself to become a Swedish. He died in Friburgh in 1966.
He was privileged to study in Budapest,Berlin and Friburgh and was teacher in Budapest,Copenhangen,Friburgh and Stockholm. With Dutch D. Coster, he began the research work that lead him to the discovery of Hafnium in 1922.

He also studied its compounds as well as the elements usually called rare-earths. He also devoted some time to biochemistry and above all, to radioactivity.

Hevesy was granted the Nobel Prize of Chemistry in 1943 for his work on Isotopes and the chemical properties of substances.

Gustav Robert Kirchoff (1824 - 1887)

Name: Gustav Robert Kirchoff

DOB: 1824

Died:  1887
Discoveries: accomplished studies on the theory of electrical circuits

G.R.K, a German born physicist was born in Koenigsberg,in 1824 and died in Berlin in the year 1887.

His more notable scientific works were in the domain of thermal radiation and of spectral analysis. He was responsible for the discovery in 1861 together with Bunsen,of the rubidium and cerium;this work enabled the first explanation of the absorption stripes usually called Fraunhofer stripes.

He also accomplished studies on the theory of electrical circuits.

He was a physics professor at the University of Heidelberg. In 1874, he went to the University of Berlin and became member of the science Academy.