18Group 1 Group 2 MetalsEasy1 markWhich statement explains the relative reactivities of calcium and strontium with hydrochloric acid?ACalcium is more reactive because it contains fewer protons in its nucleus.BCalcium is more reactive because it has a smaller atomic radius.CCalcium is less reactive because it contains fewer protons in its nucleus.DCalcium is less reactive because it has a smaller atomic radius.Grade answerSolutionGrading criteria