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Trends in Group-18 Elements - 1 Video Lecture | Chemistry Class 12 - NEET

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FAQs on Trends in Group-18 Elements - 1 Video Lecture - Chemistry Class 12 - NEET

1. What are the elements in Group-18?
Ans. Group-18 elements are also known as noble gases and include helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn).
2. What are the trends observed in Group-18 elements?
Ans. The trends observed in Group-18 elements include an increase in atomic radius and boiling point as you move down the group, as well as a decrease in ionization energy and reactivity.
3. Why are Group-18 elements called noble gases?
Ans. Group-18 elements are called noble gases because they are very stable and unreactive due to their full outer electron configuration. This stability is similar to the noble qualities associated with nobility.
4. How do the boiling points of Group-18 elements compare to other elements?
Ans. The boiling points of Group-18 elements are generally lower than those of other elements due to their weak van der Waals forces of attraction between atoms. These forces increase with atomic size, contributing to the trend of increasing boiling points down the group.
5. What is the significance of Group-18 elements in various applications?
Ans. Group-18 elements have several important applications. For example, helium is widely used in balloons and as a coolant in cryogenics. Neon is used in lighting, argon is used in light bulbs and welding, and xenon is used in high-intensity lamps and in medical imaging. Additionally, radon is a radioactive noble gas and is used in some medical treatments and in the detection of leaks in sealed systems.
150 videos|378 docs|213 tests
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