Chemistry
Give a reason why the non-metals – halogens and noble gases are placed in separate groups of the periodic table with special reference to their properties and uses.
Metals & Non-Metals
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Answer
Reasons for keeping halogens and noble gases in separate groups of the periodic table with special reference to their properties and uses are:
- Halogens are highly reactive non-metals. They readily react with metals to form salts. On the other hand, noble gases are inert or inactive due to their stable electronic configuration.
- Halogens typically exist as diatomic molecules whereas noble gases are monoatomic.
- The reactivity of halogens make them useful in variety of applications like disinfectants (chlorine), pharmaceuticals (iodine) and as non-stick coatings (fluorine derivatives), etc. The inert nature of noble gases makes them useful in neon signs (neon gas), weather balloons & cryogenics (helium), anesthesia (xenon), etc.
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