26. (a) What is an ion ? How is an ion formed ? Explain with the help of two examples of different ions(b) The valencies (or charges) of some of the ions are given below:Valency(Charge1+1+2+2+Valency(Charge)1-1-2-3-IonIonSodium ionAmmonium ionCalcium ionLead ionBromide ionHydroxide ionSulphate ionPhosphate ionUsing this information, write down the formulae of the following compounds:(1) Sodium phosphate(ii) Calcium hydroxide(ii) Ammonium sulphate(iv) Lead bromide

26. (a) What is an ion ? How is an ion formed ? Explain with the help

1.	26. (a) What is an ion ? How is an ion formed ? Explain with the help of two examples of different ions(b) The valencies (or charges) of some of the ions are given below:Valency(Charge1+1+2+2+Valency(Charge)1-1-2-3-IonIonSodium ionAmmonium ionCalcium ionLead ionBromide ionHydroxide ionSulphate ionPhosphate ionUsing this information, write down the formulae of the following compounds:(1) Sodium phosphate(ii) Calcium hydroxide(ii) Ammonium sulphate(iv) Lead bromide
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