Question

The atomic radius decreases along the period but the inert gases have the maximum radius in a period.
It true enter 1 else 0

Answer 1

Hint: The measure of the size of the atom is known as atomic radius. It is usually the mean distance from the center of the nucleus to the boundary of the surrounding shells of electrons.

Complete answer:
In the Modern Periodic Table the Categorisation is purely based on the number of the groups and the periods. The horizontal rows are called periods and the vertical columns are known as groups. There are 7 periods and 18 groups in the modern periodic table. The atomic number of the elements increases as you move down a group or across a period.

Noble gases are the elements present in the group 18 of the Modern Periodic Table and they have completely filled the outermost shell. They are chemically inert in nature.

The atomic radius decreases along the period but the inert gases have the maximum radius in a period because of the increase in the Van der Waals radii in case of the inert gases. No covalent bonds are formed by the inert gases. Thus no force operates between the crystal of a Noble gas and the Van der Waals forces are the only attractive forces. Since, the Van der Waals radii are larger than the covalent radii, the inert gases have largest atomic radii in the respective periods.

Thus the given statement is correct.

Note:
The Van der Waal radius is the measure of the size of the atom which is not chemically bonded and is defined as half of the closest distance of two equal and non- covalently bonded atoms in a molecule.