
What are ionic compounds. Give two examples.

Important Questions on Atoms and Molecules
What are molecular compounds? Give two examples.

What is an ion? How is an ion formed? Explain with the help of two examples of different ions.

The valencies (or charge) of some ions are given below:
Ion | Valency (charge) | Ion | Valency (charge) | |
Sodium ion | Bromide ion | |||
Ammonium ion | Hydroxide ion | |||
Calcium ion | Sulphate ion | |||
Lead ion | Phosphate ion |
Using the information, write down the formula of the following compound:
Sodium phosphate

The valencies (or charge) of some of the ions are given below:
Ion Valency(Charge) Ion Valency(Charge)
Sodium ion 1+ Bromide ion 1-
Ammonium ion 1+ Hydroxide ion 1-
Calcium ion 2+ Sulphate ion 2-
Lead ion 2+ Phosphate ion 3-
Using the information, write down the formula of the Ammonium sulphate compound.

The valencies (or charge) of some of the ions are given below:
Ion Valency(Charge) Ion Valency(Charge)
Sodium ion 1+ Bromide ion 1-
Ammonium ion 1+ Hydroxide ion 1-
Calcium ion 2+ Sulphate ion 2-
Lead ion 2+ Phosphate ion 3-
Using the information, write down the formula of the Calcium hydroxide compound.

The valencies (or charge) of some ions are given below:
Ion | Valency (charge) | Ion | Valency (charge) | |
Sodium ion | Bromide ion | |||
Ammonium ion | Hydroxide ion | |||
Calcium ion | Sulphate ion | |||
Lead ion | Phosphate ion |
Using the information, write down the formula for Lead bromide.


The valencies(or charges) of some of the ions are given below:
Ion Valency(charge) Ion Valency(charge)
Sodium ion 1+ Nitrate ion 1-
Copper ion 2+ Sulphide ion 2-
Using this information, write down the formula of sodium sulphide.
