electroneutralityelectronic densityelectronic excitationelectronic formulaelectronic structureelectronic transitionelectroosmotic effectelectrophileelectrophilicelectrophilic additionelectrophilic aromatic substitutionelectrophilic attackelectrophilic reagentelectrophoresiselectroplatingelectropositiveelectrostatic attractionelectrostatic crystal field theoryelectrostatic forceelectrostatic interactionelectrostatic repulsionelectrostaticselectrovalenceelectrovalence numberelectrovalencyelectrovalent bondelementelemental analysiselementary particleselementary reactionelimination reactioneluanteluateeluentelutionelution analysisemetic gasemfemissionemission spectroscopyemittanceempirical equationempirical formulaemulsifieremulsiforemulsifying agentemulsionemulsion polymerizationemulsion stabilizerenamel