Describe what an Ion is and how I️t is formed

They formed from chemical reactions that combined iron and oxygen in marine and fresh waters. hematite and magnetite are two most important minerals

A ion is a tiny particle having a non-zero net electrical charge, such as an atom or molecule whose total number of electrons is not equal to its total number of protons. A cation is a positively-charged ion, while an anion is negatively charged.