Which of the following statements is true about noble gases?

Noble gases are indeed found in Group 18 of the periodic table, which is a crucial aspect of their identity. This group includes elements like helium, neon, argon, krypton, xenon, and radon. The significance of their position in Group 18 lies in their unique electronic configuration, characterized by a full valence shell of electrons. This stable configuration is the reason why noble gases exhibit very low reactivity with other elements, making them quite distinct compared to other groups in the periodic table.

In contrast, the other statements do not accurately describe noble gases. They are not highly reactive (as stated in the first choice), they have a limited ability to form compounds (as indicated in the third choice), and while some noble gases can exist in liquid form at very low temperatures, they are primarily gaseous under standard conditions and are not typically categorized as liquid at room temperature (as mentioned in the fourth choice). Thus, the correct statement about noble gases is that they are found in Group 18.