What does electropositive mean?
Electropositive is an adjective describing something that carries, or tends to acquire, a positive electric charge. In chemistry, an electropositive element is one with little attraction for electrons: it readily loses them to form positive ions (cations). The alkali metals — lithium, sodium, potassium, and their neighbours — are the classic examples, with caesium and francium standing at the extreme end of the scale. Electropositivity is essentially the mirror image of electronegativity: where fluorine is the most electronegative element, fiercely drawing electrons toward itself, caesium is among the most electropositive, surrendering them almost willingly. This property explains much of everyday chemistry, from why sodium reacts violently with water to why certain metals corrode while others resist it. The word appears mainly in scientific and technical contexts — textbooks, research papers, and materials science — and pairs naturally with modifiers such as 'highly' or 'strongly'. Its antonym, electronegative, is worth knowing alongside it, since the two terms together describe the fundamental tug-of-war over electrons that underlies all chemical bonding.
adjectiveHaving a positive electric charge, or tending to acquire one; (of an element or radical) tending to lose electrons and form positive ions in chemical reactions. More generally, carrying a positive electrical potential.
- (Chemistry) Tending to lose electrons and form positive ions; having a low electronegativity.
- (Physics) Carrying a positive electric charge or potential.
"Sodium is a strongly electropositive metal, readily giving up its outer electron to form a positive ion."
"Alkali metals such as potassium are among the most electropositive elements on the periodic table."
"In the galvanic series, zinc acts as the electropositive electrode and corrodes preferentially to protect the iron."
Flip the periodic table on its head: the most electropositive elements — caesium and francium — are so eager to shed electrons that caesium explodes on contact with water.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of electropositive
The word combines 'electro-', from the Greek ēlektron meaning amber (the substance whose static properties gave electricity its name), with 'positive', from Latin positivus via French positif. It emerged in the early nineteenth century as chemists and physicists began systematically classifying substances by their electrical behaviour, particularly following Volta's work on electrochemical cells. Closely related coinages include 'electronegative' and 'electrochemical', all built on the same combining root.
Related word forms
How electropositive is actually used
A technical term used chiefly in chemistry, physics, and electrochemistry; rare outside scientific writing. In chemistry it is effectively the complement of 'electronegative', so context usually makes clear which scale is being discussed.
Easily confused with electropositive
Electropositive describes atoms that tend to lose electrons and become positively charged, while electronegative describes those that attract electrons and become negatively charged — they are chemical opposites.
Electrostatic refers to stationary electric charges or phenomena involving them generally, whereas electropositive specifically means having or acquiring a positive charge.