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An atom changes to a charged particle called ion if it loses or gains electrons. The charge on an ion is the charge on electrons plus charge



The charge present in an ion is the extra electron pocessed by the atom or lack of electron present in an atom.EXAMPLE:in O⁻²,-2 is the extra two electron present.Na⁺¹,+1 is the lack of one electron.
1.If an atoms contains extra electron it is called as ANION.EX- chloride ion-Cl⁻,Bromide ion-Br⁻,Iodine ion - I⁻.
2.If an atom contains lack of electron it is called as CATION.EX-Sodium ion-Na⁺,Potassium ion-K⁺.

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