Q.
Monovalent sodium and potassium ions, divalent magnesium and calcium ions are found in
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J & K CETJ & K CET 2014The s-Block Elements
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Solution:
Na,K,Mg and Ca are vital elements. Their ions are present in biological (body) fluids. Na+and Ca2+ ions are present mainly in extracellular region (outside the cell). On the other hand, K+and Mg2+ ions are found inside the animal cells.