Question

A pure substance which contains two different kinds of atoms is called _________.

Answer 1

Compound: A compound is a pure substance in which two or more elements combine chemically in a fixed composition to give a compound.

• As different elements combine in a fixed ratio to give a compound, so the atoms of different elements are present in a compound.
• Example: Water $\left({\mathrm{H}}_2\mathrm{O}\right)$
• Water is a compound that contains atoms of two different elements i.e.; Hydrogen $\left(\mathrm{H}\right)$ and Oxygen$\left(\mathrm{O}\right)$.

Therefore, a pure substance which contains two different kinds of atoms is called compound.