Question

in a period of the periodic table generally the size of an atom decreases with increase in atomic number but at the end of each period in noble gases,the atomic size increases abruptly,why?​

Answer 1

Answer:

Due to Vander Waal radius.

Explanation:

The at. radius is usually measured using three ways:

1. Covalent Rad.

2. Metallic Radius.

3. Van der Waal's Radius ( for noble gases)

As Van der Waal's Radius is maximum that is why size increases abruptly at the end of the period