Multiple choice The correct order of hydration enthalpies of alkali metal ions is Na+ > Li+ > K+ > Rb+ > Cs+ Li+ > K+ > Na+ > Rb+ > Cs+ Li+ > Na+ > K+ > Rb+ > Cs+ Cs+ > Rb+ > Na+ > K+ > Li+ Cs+ > Rb+ > K+ > Na+ > Li+ Reveal answer Fill a bubble to check yourself C Correct answer Explanation Correct order of hydration enthalpies is Li+ > Na+ > K+ > Rb+ > Cs+.