Chem 154 definition terms - Study guides, Class notes & Summaries

core electrons - The electrons that are not in the outermost shell of an atom valence electrons - Electrons on the outermost shell, which for chemical bonds cation size - Smaller than neutral atom due to less electrons which are pulled closer by the nucleus anion size - larger than neutral atom isoelectronic - same number of electrons, the more negative a species is, the greater its size Effective nuclear charge (Zeff) - the actual nuclear charge experienced by an electron, atoms ...