Would you expect strontium (Sr) to be more like potassium (K) or bromine (Br)? Why?
Strontium would be more like potassium.
Strontium and potassium are both metals. Bromine is a nonmetal. In chemical reactions, strontium and potassium will donate electrons to nonmetals. Nonmetals will either receive electrons from metals, or share electrons with other nonmetals.