Simplify the following text for a Grade 9 native English-speaking person.
Original: Svante August Arrhenius ( 19 February 1859 â `` 2 October 1927 ) was a Swedish scientist , originally a physicist , but often referred to as a chemist , and one of the founders of the science of physical chemistry .
Simplified: Svante August Arrhenius ( 19 February 1859 â `` 2 October 1927 ) was an outstanding Swedish scientist .