Noun
(uncountable) The condition of being electropositive.
(countable) A measure of the extent to which something is electropositive.
Source: en.wiktionary.orgThe main problem of isolating thorium lies not in its chemical electropositivity, but in the close association of thorium in nature with the rare earth elements and uranium, which collectively are difficult to separate from each other. Source: Internet
The opposite of electronegativity is electropositivity: a measure of an element's ability to donate electrons. Source: Internet