Confused about ions? We'll learn the difference between an atom and an ion. Ions are formed because of a net charge on an atom, because the number of protons and electrons do not balance. This means that the atom is no longer electrically neutral, but is a cation or an anion. We also talk about polyatomic ions.

Using Bohr-Rutherford diagrams to demonstrate the formation of ions.

Using electron configurations to demonstrate and explain the formation of ions

Finding ionic charges for elements on the Periodic Table is a fundamental skill in chemistry. There are two primary methods to help you remember the charges.