Advertisements
Advertisements
प्रश्न
What is meant by a chemical formula ? Write the formulae of one element and one compound.
उत्तर
A chemical formula is an expression that denotes the number and types of atoms present in a molecule of a substance. It is a representation of the composition of a molecule, in terms of the elements present, using their symbols.
For example: O2 is the chemical formula of the element oxygen. Therefore, one molecule of oxygen comprises two atoms.
CO2 is the chemical formula of the compound carbon dioxide. It consists of one atom of carbon and two atoms of oxygen.
APPEARS IN
संबंधित प्रश्न
Write down the formulae of sodium sulphide.
Define ‘formula unit’ of an ionic compound. What is the formula unit of (i) sodium chloride, and
(ii) magnesium chloride ?
The formula of carbonate of a metal M is M2CO3.
What will be the formula of its nitride ?
Name the element in the compound and give the formula of the following compound:
Carbonic acid
Write the formula of the following compound:
Sodium sulphite
Write the formula of the following compound:
Aluminium hydroxide
Write the formula of the following compound:
Aluminium oxide
Write the formula of the following compound:
Lead [II] hydroxide
What do you understand by chemical formula of a compound? What is its significance?
Write the molecular formulae for the following compounds
Magnesium (II) acetate
