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The size of Cl^(-)=1.81ÅandCl=0.99Å. E...

The size of `Cl^(-)=1.81ÅandCl=0.99Å`. Explain.

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`C1-1s^(2)2s^(2)2p^(6)3s^(2)3p^(5),C1^(-)-1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)`
Generally anions are larger than their parent atom
`C1^(-)` had 18 electrons and C1 has 17 electrons . The later experiences an greater effective inward pull by the nucleus.
This decreases the size of C1 atom when compared to `C1^(-)` ion.
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SURA PUBLICATION-PERIODIC CLASSIFICATION OF ELEMENTS-ADDITIONAL SHORT ANSWERS
  1. Noble gases have maximum ionisation energy. Justify.

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  2. Which of the following species will have the largest and smallest siz...

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  3. The size of Cl^(-)=1.81ÅandCl=0.99Å. Explain.

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  4. How does the shielding effect caused by inner electrons affect the ion...

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  5. Larger the size of the atom ,lesser is the ionisation energy . Explain...

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  6. Define lonization enthalpy.

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  7. Noble gases have almost zero electron affinity give reason.

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  8. Which among the halogens would you expect to have the least electroneg...

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  9. Arrange the following elements in the increasing order of non - metall...

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  10. Give reason for the following statement. Halogens act as good oxidisin...

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  11. Write notes on triads and periods.

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  12. Write a note about chancourtois classification .

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  13. Mention the names of the elements with atomic number 101 ,102,109 and ...

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  14. Write any two characteristic properties of alkali metals.

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  15. Account for the fact that noble gases exhibit low chemical reactivity.

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  16. What are semi - metal ? Give example.

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  17. What are periodic properties ? Give example.

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  18. Define ionic radius.

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  19. Electron gain enthalpy values

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  20. Electron gain enthalpy is F is less negative than Cl Why ?

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