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The correct decreasing order of atomic s...

The correct decreasing order of atomic size among the following species is :
`Ar,K^(+),Cl^(-),S^(2-),Ca^(2+)`

A

`Ca^(2+) gt K^(+) gt Ar gt Cl^(-) gt S^(2-)`

B

`K^(+) gt Ca^(2+) gt Cl^(-) gt Ar gt S^(2-)`

C

`S^(2-) gt Cl^(-) gt Ar gt K^(+) gt Ca^(2+)`

D

`S^(2-) gt Ar gt Cl^(-) gt Ca^(2+) gt K^(+)`

Text Solution

Verified by Experts

The correct Answer is:
C
In isoelectronic ions, the atomic size decreases as z/e ratio increases.
`S^(2-) (z)/(e) = (16)/(18), Cl^(-1) (z)/(e) = (17)/(18), Ar(z)/(6) =(18)/(18), K^(+) (z)/(e) = (19)/(18), Ca^(2+) (z)/(e) = (20)/(18)`
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GRB PUBLICATION-PERIODIC TABLE-B.Atomic and Ionic Radius
  1. When the following five anions are arranged in order of decreasing ion...

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  2. Which of the following isoelectronic species has the largest radius?

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  3. The correct decreasing order of atomic size among the following specie...

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  4. Ionic radii of :

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  5. The correct order of radii is:

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  6. Arrange Ce^(3+),La^(3+), Pm^(3+) and Yb^(3+) in increasing order of th...

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  7. Which one of the following ions has the highest value of ionic radius?

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  8. The set representing the correct order of ionic radius is

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  9. Which of the following statement is incorrect for the isolectronic spe...

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  10. Ionic radii are

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  11. The correct order of radii is:

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  12. K^(+),CI^(-),Ca^(2+),S^(2-) ions are isoelectronic. The decreasing ord...

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  13. Li resembles Mg due to diagonal relationship which is atributed to:

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  14. Select the correct statement.

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  15. Among the following species the highest radius is of:

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  16. In which of the following compound size of cation to anion ratio is mi...

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  17. Choose the incorrect ionic radius order.

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  18. Choose the correct order of atomic/ionic radii.

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  19. Correct order of radius among the following F^(-),Al^(3+),Na^(+) are

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  20. Which of the following is correct regarding atomic radius?

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