The following elements will most likely form ionic bonds: K and Ca; Sr and Ba; C and O; and Br and I?

The given question is incorrect. The complete question is as follows.

The following elements will most likely form ionic bonds: K and Ca; Sr and Ba; Ca and O; and Br and I?

Explanation:

An ionic compound is defined as the compound formed due to transfer of electrons from one atom to another.

An ionic bond is always formed between a metal and a non-metal.

For example, calcium is a metal and oxygen is a non-metal. So, both of them can chemically combine with each other and leads to the formation of calcium oxide (CaO) compound.

On the other hand, when there occurs sharing of electrons between two atoms then the bond formed is known as covalent bond.

A covalent bond is always formed between two same or different non-metals.

For example, a covalent bond is present between Br and I when both of them chemically combine with each other.

Thus, we can conclude that Ca and O elements will most likely form ionic bonds.