Periodic Table Part 9: Noble Gases (He, Ne, Ar, Kr, Xe, Rn, Og)

The video tutorial covers Group 18 elements, known as noble gases, highlighting their properties, abundance, extraction methods, reactivity, and applications. Noble gases are generally inert, with filled valence shells, making them stable. Helium, neon, argon, krypton, xenon, radon, and oganesson are discussed, with a focus on their unique characteristics and uses. While helium is abundant in the universe, it is scarce on Earth. Xenon is notable for forming compounds due to its low ionization energy. Applications range from helium in balloons to neon in lights. Health concerns, particularly with radon, are also addressed.

Which of the following is a characteristic of noble gases that makes them unique among elements?

• They form diatomic molecules.

• They have incomplete valence shells.

• They are highly reactive.

• They exist as monoatomic gases.

Why is helium rare on Earth despite being the second most abundant element in the universe?

• It is absorbed by the Earth's crust.

• It is too light and escapes into space.

• It is too heavy to remain in the atmosphere.

• It reacts with other elements to form compounds.

Which noble gas is known for its ability to form a variety of compounds, particularly with halogens and oxygen?

• Neon

• Helium

• Radon

• Xenon

What is a common use of helium that most people are familiar with from a young age?

• Lighting

• Balloons

• Welding

• Refrigeration

Which noble gas is primarily used in neon lights and signs?

• Argon

• Krypton

• Neon

• Xenon

What is the main reason argon is used in incandescent light bulbs?

• It is cheaper than other gases.

• It prevents the tungsten filament from oxidizing.

• It is lighter than air.

• It reacts with tungsten to produce light.

Which noble gas is used as a propellant in ion drive engines?

• Radon

• Xenon

• Neon

• Helium