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(a) What is an ion ? Explain with examples.

(b) What is the nature of charge on (i) a cation, and (ii) an anion ?

(c) Name the cation and anion present in MgCl2 . Also write their symbols.

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(a) An ion is an electrically charged atom (or group of atoms). Example: Sodium ion, Na + , magnesium ion, Mg 2+ .

(b) (i) Positive charge (ii) Negative charge

(c) Cation: Magnesium ion, Mg 2+

Anion: Chloride ions, 2Cl –

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