Inert gases, also known as noble gases, belong to the p-block of the periodic table. The p-block elements are located on the right side of the periodic table, encompassing groups 13 to 18. The groups in the p-block are labeled from 13 to 18.

Explanation:
1. Periodic Table:
The periodic table is a tabular arrangement of chemical elements, organized based on their atomic numbers, electron configurations, and recurring chemical properties. It is divided into several blocks: s-block, p-block, d-block, and f-block.

2. Blocks in the Periodic Table:
- s-block: The s-block elements are located in the first two groups (1 and 2) on the left side of the periodic table. These elements have their outermost electrons in the s-orbital.
- p-block: The p-block elements are found in groups 13 to 18, on the right side of the periodic table. These elements have their outermost electrons in the p-orbital.
- d-block: The d-block elements are situated in groups 3 to 12, between the s-block and p-block. These elements have their outermost electrons in the d-orbital.
- f-block: The f-block elements are located at the bottom of the periodic table and consist of the lanthanides and actinides. These elements have their outermost electrons in the f-orbital.

3. Inert Gases:
Inert gases, or noble gases, are a group of chemical elements that have very low reactivity due to their stable electron configurations. They include helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn). These elements have full valence electron shells, making them highly stable and unreactive.

4. Noble Gases in the p-block:
The noble gases (inert gases) belong to the p-block of the periodic table because they have their outermost electrons in the p-orbital. They are located in group 18, also known as Group 0 or Group VIII A. This group is often referred to as the noble gas group because of the properties exhibited by these elements.

Conclusion:
In summary, inert gases or noble gases belong to the p-block of the periodic table. The p-block elements, located on the right side of the table, include groups 13 to 18. Inert gases have their outermost electrons in the p-orbital, which contributes to their low reactivity and stability.