Question

a) Write down the chemical formula of Aluminium Sulphate.
b) Name the elements present in Quick lime.
c) What are polyatomic ions? Give example.​

Answer 1

Answer:

a) Al2S3O12

b)Calcium and oxygen

c)Polyatomic ions are ions which consist of more than one atom. For example, nitrate ion, NO3-, contains one nitrogen atom and three oxygen atoms. The atoms in a polyatomic ion are usually covalently bonded to one another, and therefore stay together as a single, charged unit.

Answer 2

Answer:

a) AI2(SO4) 3

b) Calcium and oxygen

c) Eg.: NO- 3 - nirate ion.

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