Why are ions in a compound attracted to each other?

Ions in a compound are attracted to each other because they carry opposite charges. This fundamental principle of electrostatics states that opposite charges attract; therefore, when a positively charged ion (cation) and a negatively charged ion (anion) come together, the electrostatic force between them forms what is known as an ionic bond. This attraction is what leads to the formation of ionic compounds, which typically results in a stable structure.

The interplay of charges is crucial: the strong attraction between the cations and anions ensures that they remain associated with one another, contributing to the overall stability and properties of the compound. If the ions had the same charge, they would repel each other, and if they were isotopes or had equal mass, there would be no charge-related interaction to create attraction. Thus, the opposite charges are the key factor in why ions come together in a compound.