Final answer:
The noble gases are in Group 18 of the periodic table. The elements in this group include helium, neon, argon, krypton, xenon, and radon.
The answer is option ⇒1
Step-by-step explanation:
Noble gases are unique because they have a full outer electron shell, making them very stable and unreactive.
Here are some key points about the noble gases:
- 1. Helium (He): It is the lightest noble gas and is widely used in balloons and airships because it is lighter than air. It is also used in various industrial applications, such as cooling in cryogenics.
- 2. Neon (Ne): It is commonly used in lighting, such as neon signs, because it produces a distinct red-orange glow when an electric current passes through it.
- 3. Argon (Ar): It is the most abundant noble gas in the Earth's atmosphere. Argon is used in various applications, including providing an inert atmosphere in light bulbs and welding.
- 4. Krypton (Kr): It is known for its use in high-intensity discharge lamps, such as those used in photography and in some car headlights.
- 5. Xenon (Xe): It is used in lighting, such as xenon headlights, and in medical imaging equipment like MRI machines. Xenon is also used in certain types of lasers.
- 6. Radon (Rn): It is a radioactive noble gas that occurs naturally in the environment. Radon is considered a health hazard and can accumulate in buildings, especially in basements, leading to an increased risk of lung cancer.
The answer is option ⇒1
Your question is incomplete, but most probably the full question was:
Which is a noble gas (group 8)?
- helium, neon, argon, krypton, xenon, and radon
- hydrogen, lithium, sodium, and potassium.
- beryllium (Be), magnesium (Mg), calcium (Ca), and strontium (Sr).
- iron (Fe), copper (Cu), and zinc (Zn)