Question

arrange the following species in increasing order of the size

sodium atom sodium Ion potassium atom





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Answer 1

Explanation:

potassium atom,sodium ion,sodium atom

Answer 2

Answer:

sodium ion<potassium atom<sodium atom

Sodium ion has two shells and hence smallest size. As we move along a period the atomic size decreases due to increase in effective nuclear charge. Hence K atom has smaller size than Na atom.