What is the chemical formula for an ionic compound of potassium and oxygen?
The last level of the electronic structure of oxygen is
This means that oxygen has two semi-occupied orbitals and, following the octet rule, will try to capture two more electrons to complete its structure and acquire that of a noble gas. That is, when it acts to form ionic bonds, oxygen acquires structure
On the other hand, potassium is an alkali metal whose last level occupied is
Therefore, the binding of oxygen and potassium will give rise to an oxide of ionic character and