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  4. The increasing order of the atomic radius of Si, S, Na, Mg, Al is

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Q. The increasing order of the atomic radius of $ Si, S, Na, Mg, Al $ is

EAMCETEAMCET 2014

Solution:

As we move from left to right in a period, effective nuclear charge increases. Due to this atomic radius decreases. Thus, correct order of atomic radii of $3^{\text {rd }}$ period elements is

$Na > Mg > Al > Si > S$