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Which of the following species will hav...

Which of the following species will have the largest and smallest size `Mg,Mg^(2+),Al,Al^(3+)`? Give reason.

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The largest species is Mg
The smallest species is `Al^(3+)` Reason :
Atomic radii decreases across a period.
Cations are smaller than their parent atoms.
Among the isoelectronic ions , the greater the charge on the cation smaller will be the radius.
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SURA PUBLICATION-PERIODIC CLASSIFICATION OF ELEMENTS-ADDITIONAL SHORT ANSWERS
  1. Out of Na and Mg , which has higher second ionisation energy?

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  2. Noble gases have maximum ionisation energy. Justify.

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

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

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

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

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  7. Define lonization enthalpy.

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

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

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

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

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  12. Write notes on triads and periods.

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  13. Write a note about chancourtois classification .

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

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  15. Write any two characteristic properties of alkali metals.

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

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  17. What are semi - metal ? Give example.

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  18. What are periodic properties ? Give example.

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  19. Define ionic radius.

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  20. Electron gain enthalpy values

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