Electropositivity character is referred to as the capacity of elements, to loose electrons, which creates the positive ions.
The tendency of an atom to donate electrons to generate positively charged cations is known as electropositivity.
The metallic elements of the periodic table, specifically the alkali metals and alkaline earth metals, mostly have the ability to generate positively charged cations, and hence are most electropositive in nature.
The list of top 5 electropositive elements: Cesium ,Rubidium,Potassium ,Sodium ,Lithium .
Hence, the above mentioned are the list of the top five electropositive elements.