Arnold Eucken

Arnold Eucken
Eucken, c. 1905
Born	3 July 1884 (1884-07-03) Jena, Saxe-Weimar-Eisenach
Died	16 June 1950 (1950-06-17) (aged 65) Seebruck, West Germany
Nationality	German
Scientific career
Doctoral advisor	Walther Nernst
Doctoral students	Manfred Eigen

Arnold Thomas Eucken (3 July 1884 – 16 June 1950) was a German chemist and physicist. He examined the energy states of the Hydrogen atom and contributed to knowledge of the atomic structure. He also contributed to chemical engineering and process control through physical chemistry measurements for applications in industry.