Q. Monovalent sodium and potassium ions, divalent magnesium and calcium ions are found in

 3092  218 J & K CETJ & K CET 2014The s-Block Elements Report Error

Solution:

and Ca are vital elements. Their ions are present in biological (body) fluids. and ions are present mainly in extracellular region (outside the cell). On the other hand, and ions are found inside the animal cells.