Chemistry In Focus

7th Edition
Tro + 1 other
Publisher: Cengage Learning,
ISBN: 9781337399692



Chemistry In Focus

7th Edition
Tro + 1 other
Publisher: Cengage Learning,
ISBN: 9781337399692
Chapter 11, Problem 16E
Textbook Problem

What are the chemical properties of argon, and helium? What are they used for?

Interpretation Introduction


The chemical properties of argon, neon and helium are to be explained. Also, their uses have to be mentioned.

Concept Introduction:

Argon, neon and helium are noble gases. These noble gases include helium (Z = 2), neon (Z = 10), argon (Z = 18), krypton (Z= 36), xenon (Z= 54), and radon (Rn= 86). These gases are arranged on the basis of their boiling points and low reactivity.

Under a given set of conditions, a gas that does not undergo any reaction is known as an inert gas.

Inert gases, being stable and less reactive, are used in the arc welding industry, cryogenic systems, bulbs, to create an inert atmosphere for synthetic reactions, etc.

Explanation of Solution

Argon, neon and helium are inert noble gases with stable electronic configurations, that is, ns2np6. Generally, they are very less reactive in nature. They are colorless and odorless monatomic gases whose physical properties show regular variations with their atomic number. With increasing atomic mass from helium, neon and argon, the solubility, boiling point, enthalpy of vaporization and atomic radii increase. Each of these elements has the highest ionization energy in its period. Van der Waals forces are the only interatomic interactions present in them because, as atomic size increases down the group, electron clouds of these non-polar atoms are more polarized. Going from helium to argon, the first ionization energy decreases. During welding, argon is employed to cover the weld area. It is also used in fluorescent tubes and incandescent bulbs to prevent oxidative corrosion of the filament; in low-energy light bulbs, a coating of argon on the inner surface of the bulb activates the UV light to glow brightly...

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Chapter 11 Solutions

Chemistry In Focus
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