Question

38. What is meant by molecular formula? Write the formulae of one element and one compound?

Answer 1

Part-1:

Molecular formula: The molecular formula is a chemical expression that states the number of atoms of each element present in a molecule of a substance.

Part-2:

The element Sodium has the symbol $\mathrm{Na}$ and Chlorine has the symbol $\mathrm{Cl}$. There are$1\mathrm{Na}$ atom and $2\mathrm{Cl}$atoms in a Sodium chloride molecule, which has a molecular formula of $\mathrm{NaCl}$.