which pairs of elements are likely to form ionic compounds.........?

Question

chlorine and bromine

potassium and helium

Answer 1

Of those two, chlorine and bromine

Potassium would also qualify, but Helium is a noble gas, and only rarely can be formed into any kind of compound.

Answer 2

Potassium and Helium.. if thats even possible..

Ionic Compounds are formed with a metal ion and a non metal ion. like NaCl

Na + = metal ion

Cl- = non metal ion.

hope that helps

Answer 3

potassium and helium are not ions, chlorine and bromine are. so its chlorine and bromine.