Which of the following groups consists of elements that are non-reactive, monoatomic elements with extremely low boiling points?

Group 18

The correct answer is option 1. Group 18.

The group that consists of elements that are non-reactive, monoatomic elements with extremely low boiling points is Group 18.

Group 18 of the periodic table is known as the noble gases or inert gases. These gases include helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn). They are characterized by their non-reactivity under normal conditions, monoatomic nature (existing as individual atoms rather than diatomic molecules), and extremely low boiling points.