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Following triads have approximately equa...

Following triads have approximately equal size

A

`Na^(+), Mg^(2+), Al^(3+)` (iso-electronic)

B

`F^(-), Ne, O^(2-)` (iso-electronic)

C

Fe, Co, Ni

D

` Mn^(+), Fe^(2+), Cr` (iso-electronic)

Text Solution

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The correct Answer is:
C
Repulsive force are balanced by attractive force. Effect of increased effective charge is balanced by repulsion between valence electrons.
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BRILLIANT PUBLICATION-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES-LEVEL-I
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  3. Following triads have approximately equal size

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  4. Which pair is different from the others?

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  5. Which is/are amphoteric oxides?

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  6. Second electron affinity of an element

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  8. Which of the following element has the highest EN?

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  9. Which of the following oxides is most basic?

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  10. The IUPAC name for the element with atomic number, Z=119 is.

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  11. An element which lies in the same group of the periodic table as mercu...

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  13. Considering the elements from left to right in the third period of the...

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