Bond - GCSE Chemistry Definition

In GCSE Chemistry, a bond refers to the force that holds atoms together in a molecule or compound, enabling the stable formation of chemical substances. Atoms bond by sharing or transferring electrons, resulting in either covalent or ionic bonds, respectively.

Covalent bonds occur when atoms share pairs of electrons, often between non-metals, leading to the formation of molecules like water (H₂O).

In contrast, ionic bonds form when one atom transfers electrons to another, typically between a metal and a non-metal, creating oppositely charged ions that attract each other, as seen in sodium chloride (NaCl).

Understanding chemical bonds is fundamental to explaining the properties and reactions of different substances in chemistry.