DE_Chem_3.1.

​DE_LE_3.1.1_How Do Monatomic Ions Form?

By NickBeth Meyer

DE_LE_3.1.2_How Do Cations and Anions Differ?

​Cations usually form from the atoms of metals, such as sodium, potassium, calcium, copper, and iron.
Anions usually form from the atoms of nonmetals, such as fluorine, chlorine, oxygen, and sulfur.

DE_LE_3.1.3_How Does the Formation of Ions Relate to the Octet Rule?

​Chemical reactions tend to occur so that the atoms of non-noble elements have a stable outer shell of eight electrons as well. Since a set of eight is an octet, this principle is called the octet rule.