Question

Atoms always combine to form a ----------------

Answer 1

Molecule: Two or more atoms of different elements combine in a definite proportion by mass is known as a molecule.

Carbon atoms react with oxygen atoms to form Carbon dioxide molecules.

Example: $\underset{\mathrm{Carbon}}{\mathrm{C}\left(\mathrm{s}\right)}+\underset{\mathrm{Oxygen}}{{\mathrm{O}}_2\left(\mathrm{g}\right)}\to \underset{\mathrm{Dioxide}}{\underset{\mathrm{Carbon}}{{\mathrm{CO}}_2\left(\mathrm{g}\right)}}$

Therefore atoms always combine to form a molecule