What is an ion?

An ion is an atom or molecule that has gained or lost one or more electrons, resulting in a positive or negative electrical charge. This occurs when an atom becomes either positively charged (cation) by losing electrons or negatively charged (anion) by gaining electrons. In the context of Grade 8 science and chemistry, understanding ions is crucial to comprehending the behavior of atoms and molecules in chemical reactions. It is fundamental to recognize that ions play a significant role in forming compounds and conducting electricity. As students delve into the world of atoms and molecules, comprehending ions is a vital step in their scientific journey.