KnowraPotassium ionLinked fromLinked fromThe 19 pages that link to Potassium ion, each with the reason it gives.All 19Broader topic 14Related 2Compared with 3Sodium ionCompared with: K⁺ has the same charge as Na⁺ but a larger ionic radius and distinct biological roles.Calcium ionCompared with: K⁺ is a major cellular ion whose charge and membrane behavior differ from Ca²⁺.Magnesium ionCompared with: K⁺ is monovalent and larger, so it does not substitute for Mg²⁺ in most binding sites.