Answer :
The pair of ions which can form an ionic bond with each other is: D. Li and Br; they have unlike charges.
An ion refers to an atom or molecules (group of atoms) that has lost or gained one or more of its valence electrons, thereby, making it have a net positive or negative electrical charge.
An ionic bond is a type of chemical bond that generally involves a metallic element transferring one or more electrons to a non-metallic element.
This ultimately implies that, ionic bonds are mainly formed between metal atoms and non-metal atoms.
In this scenario, the pair of ions which can form an ionic bond with each other is lithium (Li) and beryllium (Br) because they have unlike charges i.e a net positive electrical charge and a negative electrical charge respectively.
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