Potassium (atomic number 19) has a single electron in its outermost shell. What type of bond is potassium most likely to be involved in?

Ionic bonding

Explanation:

Well firstly it cant form a covalent bond because its a metal. So that leaves ionic and metallic bonding.

Its more likely to form an ionic bond because it has one electron which it needs to get rid of to complete the shell and an element that would need the extra shell would be a group 7 element like neon which only has 7 electrons on its outermost shell. The potassium and neon would react so that the neon could take the electron from the potassium to complete the shell and in turn that would also leave potassium with a full shell making them both stable.

I hope this kinda helped