Explanation:

The element with atomic number 118 is oganesson (Og), which is a synthetic element and belongs to the noble gas group. Here is a detailed explanation of why the correct answer is option 'B'.

Atomic Number:
The atomic number of an element represents the number of protons in the nucleus of an atom. It is a unique identifier for each element and determines its position in the periodic table.

Noble Gases:
Noble gases are a group of elements that have completely filled electron shells. They are known for their low reactivity and are often referred to as inert gases. The noble gas group consists of helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn), and oganesson (Og).

Oganesson (Og):
Oganesson is the heaviest element in the periodic table and has the atomic number 118. It was first synthesized in 2002 and is highly unstable, decaying quickly into other elements. Due to its high atomic number, oganesson is classified as a superheavy element.

Noble Gas Properties:
Noble gases have a full outer electron shell, which makes them stable and unreactive. They rarely form compounds with other elements and are often found in their elemental form. Noble gases are colorless, odorless, and have low boiling points. They are used in various applications, such as lighting, lasers, and cryogenics.

Periodic Table:
The periodic table is a tabular arrangement of elements based on their atomic number, electron configuration, and recurring chemical properties. It is divided into groups and periods, with each element placed in a specific position. Noble gases are located in Group 18 (VIII A) of the periodic table.

Conclusion:
Based on the given information, the element with atomic number 118 is oganesson, which belongs to the noble gas group. It exhibits the typical properties of noble gases, including low reactivity and a full outer electron shell.