- नोबल गैस (Noble gases ; inert gases) : found in the periodic table’s Group 18.
- They include helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn).
- they exhibit very low reactivity under normal conditions.
- Noble gases have a stable electronic configuration with a full outer shell of electrons (except for helium, which has only two electrons in its outer shell).
- Noble gases have low boiling points means they exist as gases at room temperature and pressure.
- In their elemental form, noble gases exist as Monoatomic
- helium is used in cryogenics, as a coolant in nuclear reactors, and in gas chromatography.
- Neon is used in lighting, such as neon signs,
- argon is used in welding and as a shielding gas in incandescent light bulbs, and
- xenon is used in specialized lighting, anesthesia, and in certain medical imaging techniques.
- Radon, is radioactive.
