Unreactive - GCSE Chemistry Definition

In GCSE Chemistry, the term 'unreactive' refers to substances that do not easily take part in chemical changes or combine with other substances under normal conditions. These substances have very stable electronic configurations, meaning they do not tend to lose or gain electrons and form new compounds. For example, noble gases like helium, neon, and argon are unreactive. They have a complete outer shell of electrons, which means they do not readily form bonds with other elements. Being unreactive makes these substances useful in situations where reactions need to be prevented, such as providing an inert atmosphere for certain chemical processes.