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The order of decrease in atomic radii fo...

 The order of decrease in atomic radii for Be, Na and Mg is

A

`Be gt Mg gt Na`

B

`Na gt Mg gt Be`

C

`Mg gt Na gt Be`

D

`Mg gt Be gt Na`

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The correct Answer is:
B
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AAKASH SERIES-PERIODIC TABLE-OBJECTIVE EXERCISE -2B
  1. O^(2-) and Si^(4+)are isoelectronic ions. If the ionic radius of O^(2-...

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  2. lonic radii (in oversetoA) of As^(3+), Sb^(3+) and Bi^(3+) follow the ...

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  3. The order of decrease in atomic radii for Be, Na and Mg is

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  4. Lanthanide contraction occurs because

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  5. Radius of Cs^(+) ion is less than that of A) Fluoride ion B) Chlo...

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  6. The sizes of A, A^+ and A^- follows the order

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  7. Which of the following has the largest atomic radius ?

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  8. Which of the following grouping represents a collection of iso-electio...

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  9. Which is not related to lanthanide contraction

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  10. A trend common to both groups 1 and 17 elements in the periodic table ...

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  11. The screening effect of d-electrons is

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  12. (A): The first ionisation energy of B is less than that of Be (R) :...

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  13. (A): The second ionisation energy of 'O' is greater than that of secon...

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  14. The species with largest ionisation potential

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  15. Which of the following has highest first ionisation potential?

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  16. The electronic configuration of elements A, B, and Care [He] 2s^(1), [...

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  17. The first ionisation potential is maximum for

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  18. Second ionization energy of an element is higher than its firs...

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  19. (A): The second electron affinity f oxygen is endothermic. (R): Oxyg...

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  20. Consider the elements N, P, O and S and arrange them in order of : ...

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