Question

which pair of elements will form an ionic bond?
o n and o
o k and br
o c and cl
o fe and ni

Explanation:

Ionic bonds form between a metal and a non - metal. Potassium (K) is a metal and bromine (Br) is a non - metal. Nitrogen (N) and oxygen (O) are non - metals and form covalent bonds. Carbon (C) and chlorine (Cl) are non - metals and form covalent bonds. Iron (Fe) and nickel (Ni) are metals and do not form ionic bonds with each other.

Answer:

K and Br