Question

Why does the the potassium has maximum atomic size

Answer 1

Potassium (K) has greater atomic radius because atomic radius increase with the increase in atomic number ,asnuclear charge increase with the increase in atomic number, so calciumis smaller atomic radius thanpotassium. ... K has a larger radius, because K has 19 protons with it and Ca has 20 protons.

Answer 2

it has the maximum atomic size due to large no of shells increasing the atomic radius and only one electrone in the valance shell minimizing the effective nuclear charge .

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