Question

group 18 element are bigger in atomic size give the reason for this​

Answer 1

Answer:

Across the period in the periodic table,atomic size decreases up to halogens but increases in noble gases. This is because in case of inert or noble gases all the orbitals are completely filled and hence inter electronic repulsions are maximum. ... Hence the atomic size of noble gases is larger than that of halogens.

Explanation:

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Answer 2

Answer:18th group elements having larger size

Explanation:because 18 the group elements are also known as Noble gas elements and the outer most shell with 8 electrons so the distance between centre of the nucleus to the outer most shell will be increased