Published first quantitative climate model calculating global warming from CO2 absorption.

Introduced chemical Activation Energy (Ea) required to reach transition states.

Arrhenius formulates the chemical rate equation k = A exp(-Ea / RT), introducing activation energy.

Derived the Arrhenius Equation (k = A exp(-Ea / RT)) governing chemical reaction rates.

Submitted Uppsala dissertation establishing electrical conductivity of electrolytes.

Arrhenius discovers that salts spontaneously dissociate into free electric ions when dissolved in water.

Proved electrolytes spontaneously dissociate into free ions in water.