<P> An ion (/ ˈaɪən, - ɒn /) is an atom or molecule that has a non-zero net electrical charge (its total number of electrons is not equal to its total number of protons). A cation is a positively - charged ion, while an anion is negatively charged . Because of their opposite electric charges, cations and anions attract each other and readily form ionic compounds, such as salts . </P> <P> Ions can be created by chemical means, such as the dissolution of a salt into water, or by physical means, such as passing a direct current through a conducting solution, which will dissolve the anode via ionization . </P>

What are the special names for positive and negative ions