Correct option is B
- Noble gases are elements in Group 18 of the periodic table. They are known for their chemical inertness due to having a complete outer electron shell. These include Helium (He), Neon (Ne), Argon (Ar), Krypton (Kr), Xenon (Xe), and Radon (Rn).
- Nitrogen (N):
- Nitrogen is a non-metal and belongs to Group 15 of the periodic table.
- Unlike noble gases, nitrogen is reactive under specific conditions and forms a variety of compounds such as ammonia (NH₃) and nitrogen oxides.
- It exists as a diatomic molecule (N₂) in nature and makes up about 78% of the Earth's atmosphere.
Additional Information
- Characteristics of Noble Gases:
- Colorless, odorless, and tasteless.
- Exhibit extremely low chemical reactivity.
- Used in various applications like neon lights (Neon), welding (Argon), and cryogenics (Helium).
- Nitrogen's Role:
- Essential for life as it is a key component of proteins and DNA.
- Used industrially in fertilizers, explosives, and as a preservative in food packaging.
Other Options
- Argon (Ar): A noble gas used in welding and as an inert atmosphere in scientific experiments.
- Neon (Ne): A noble gas used in lighting and high-voltage indicators.
- Helium (He): The lightest noble gas, used in balloons and cryogenics.
