Question

which element will form an ionic bond with rubidium, rb? iodine, i cesium, cs gallium, ga magnesium, mg

Explanation:

Step1: Recall ionic - bond formation

Ionic bonds form between a metal and a non - metal. Rubidium (Rb) is a metal (an alkali metal).

Step2: Identify non - metals among options

Among iodine (I), cesium (Cs), gallium (Ga), and magnesium (Mg), iodine is a non - metal. Cesium is a metal, gallium is a metal, and magnesium is a metal.

Answer:

iodine, I