what is ion ? give two examples of it
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An ion is an atom or group of atoms where the number of electrons is not equal to the number of protons. When an atom loses or gains electrons, a positive or negative charge is the result. If electrons are gained, the ion is a cation and when electrons are lost, it is an anion.
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An ion is an atom or molecule that has a net electrical charge.
Ex- Na+,cl+
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