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Helium and neon do not form compounds wi...

Helium and neon do not form compounds with fluorine. Why ?

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He and Ne do not contain d-orbitals in their respective valence shells and hence their electrons cannot be promoted to higher energy levels like that in Xe to form bonds. Therefore, He and Ne do not form compounds with fluorine.
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OSWAAL PUBLICATION-P - BLOCK ELEMENTS-TOPIC - 4 (GROUP - 18 ELEMENTS, THEIR PROPERTIES AND SOME IMPORTANT COMPOUNDS)(VERY SHORT ANSWER TYPE QUESTIONS)
  1. What is the shape of XeF(6) molecule ?

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  2. Why has it been difficult to study the chemistry of radon ?

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  3. Helium and neon do not form compounds with fluorine. Why ?

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  4. Why are the elements of Group - 18 known as noble gases?

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  5. Neon is generally used for warning signals. Why ?

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  6. Why do noble gases form compounds with fluorine and oxygen only?

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  7. What prompted Bartlett to the discovery of noble gas compounds.

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  8. Noble gases have very high ionisation enthalpy. Why ?

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  9. Ionisation enthalpy decreases down the group in noble gases. Why ?

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  10. How does atomic radii changes in group - 18 elements ?

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  11. Noble gases have large positive values of electron gain enthalpy. Why ...

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  12. Name the first noble gas compound prepared by Neil Bartlett?

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  13. Give common names of noble gases.

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  14. How is XePtF(6) prepared ?

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  15. How is radon obtained ?

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  16. What is the percentage of noble gases in the atmospheric air ?

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  17. Which noble gas in most abundant in atmospheric dry air?

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  18. Why noble gases are called rare gases ?

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  19. Why are the elements of Group - 18 known as noble gases?

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  20. Why the noble gases are called inert gases ?

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