Does noble gas has the largest atomic size in their respective period even though the atomic size decreases from moving across a period? If this is true, then will atomic size of Ar is greater than Na?

Dear student,

Generally atomic size decreases from left to right in a period along the periodic table. But Noble gases are comparatively larger than the other elements in the same period because they have only Van der Walls radii which have larger magnitude. On the other hand, other elements have  ionic or covalent radii which are less in size. So the size of Ar is larger than Na in the same period.

Regards.

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Yes and Yes
 
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#yadu please explain me why
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Yes And Yes
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I THINK NO
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Sagar, check internet. You would find tge size of noble gas is greatest in tgeir respective period. But, i wqnt to why it is so?
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