What will be the relative atomic size of the 18th group element of a period as compared to other elements of the same period
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it is greatest among all elements in that period
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Answer: The relative atomic size of the 18th group element of a period as compared to other elements of the same period is less.
Explanation: Atomic radius of an atom is defined as the total distance from the nucleus to the outermost orbital of electron.
As moving across a period, there is an increase in the number of electrons and protons but the electrons get added to the same shell, thus the electrons get more attracted by the larger number of protons , the outermost orbital gets near to the nucleus and hence the distance between the nucleus and outermost orbital decreases.
This in turn decreases the atomic radii of the element from moving across a period till 18th group.
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