Question

Why the size of atom of inert gases are larger than the preceding halogens?

Answer 1

HELLO THERE!

The normal trend is that, the atomic size decreases when we go from left to right of the periodic table. However, in case of noble gases, there is an exception, because their size is larger than the halogen atoms, inspite of being located right to the latter.

Explanation:

This is because of the inter-electronic repulsion in the noble gases' atoms. They have their octet complete, and hence the repulsion creates a wobbling force, due to which the size of the atom increases. This makes the size of the atoms of noble gases larger than their preceding halogens.

Thanks!

Answer 2

Answer:

noble gases have comparatively higher atomic size than corresponding halogens because of the reason that vander waal's radii (present in noble gases) is much larger than ionic and covalent radii (present in other elements)