Although sodium and potassium occur in similar amounts in
Chapter 4, Problem 94QP(choose chapter or problem)
Although sodium and potassium occur in similar amounts in the Earth’s crust, living cells accumulate potassium ions almost exclusively. K+ cannot be replaced by Na+ in cells, but it is possible for other ions to replace K+. Based on the similarity of their chemical properties, which of the following ions might be suitable replacements for K+ in cells: Rb+, Al3+, Ga+, Cs+, Fe2+?
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