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Ion, any atom or group of atoms that bears one litio or more positive or negative bateria de ion litio pdf electrical charges. most of the elements that make ionic compounds form an ion that has a characteristic charge. ions migrate under the influence of an electrical field and are the conductors of electric current in electrolytic cells. positively charged ions are called cations; negatively charged ions, anions. pdf history and meaning. in other words, there is an imbalance in the number of protons ( positively charged particles) and electrons ( negatively charged particles) in a chemical species. the number of each type of bateria ion is indicated in the formula by the subscript. an ion is defined as an atom or molecule that has gained or lost one or more of its valence electrons, giving it a net positive or negative electrical charge. for example, sodium makes ionic compounds in.
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