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Table given below shows a part of the pe...

Table given below shows a part of the periodic table:

Using this Table, explain why .
Atomic size of Mg is less than that of Na.

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As we move from left to right in a period, effective nuclear charge increases. The nucleus pulls the valence electrons with a greater force. The size of the atom, therefore, decreases on going from left to right in a period. That is why atomic size of Mg is less than that of Na.
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SWAN PUBLICATION-PERIODIC CLASSIFICATION OF ELEMENTS -ADDITIONAL IMPORTANT QUESTIONS (Short Answer Type Questions)
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