Work out the formulae for the following compounds :(a) Sodium oxide(b) Calcium carbonate


(a) Valency of Sodium = 1
Valency of Oxygen = 2
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Formula for sodium oxide can be worked out by crossing the valency of the constituent elements.
Therefore, formula for sodium oxide is: Na2O.

(b) Valency of Calcium      = 2
Valency of Carbonate ion = −2
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Formula for calcium carbonate can be worked out by crossing  the valency of the constituent elements/ions.
Therefore, formula for calcium carbonate is: CaCO3.

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Updated on: 10-Oct-2022

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