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How does atomic radii changes in group -...

How does atomic radii changes in group - 18 elements ?

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Increases down the group.
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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 prompted Bartlett to the discovery of noble gas compounds.

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

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

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

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

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

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  7. Give common names of noble gases.

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  8. How is XePtF(6) prepared ?

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  9. How is radon obtained ?

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

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

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  12. Why noble gases are called rare gases ?

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

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  14. Why the noble gases are called inert gases ?

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  15. Write the general electronic configuration of noble gases.

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  16. Draw the structure of XeF(2) molecule.

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  17. What inspired N. Bartlett for carrying out reaction between Xe and PtF...

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  18. Helium is used in diving equipment.

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  19. Draw the molecular structure of XeF(6).

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  20. Complete the following chemical equation - XeF(4)+SbF(5)rarr

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