Arrhenius may refer to Birgit Arrhenius (born 1932), Swedish archaeologist Carl Axel Arrhenius (1757–1824), Swedish army lieutenant and amateur mineralogist who discovered ytterbite, a mineral that led to the discovery of yttrium by Johan Gadolin Niklas Arrhenius, Swedish discus thrower Svante Arrhenius (1859–1927), Swedish physical chemist and 1903 Nobel laureate Arrhenius definition, Svante Arrhenius definition of acids and bases Arrhenius equation, Svante Arrhenius formula for modeling the temperature dependence of reaction rate constants Arrhenius plot Arrhenius (lunar crater), named for Svante Arrhenius 5697 Arrhenius, main-belt asteroid, named for Svante Arrhenius Arrhenius (Martian crater), named for Svante Arrhenius Olof Arrhenius (1895–1977), Swedish plant physiologist