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In which one of the following pairs is t...

In which one of the following pairs is the radius of the second species greater than that of the first?

A

`Na, Mg`

B

`Ba^(2+), Sr^(2+)`

C

`O^(2-), N^(3-)`

D

`Li^(+),Be^(2+)`

Text Solution

Verified by Experts

The correct Answer is:
C
Both `O^(2-)`and `N^(3-)`are isoelectronic. For such species, size increases with increase of negative charge. Moreover the nuclear charge of `N^(3-)` is less than that of `O^(2-)`.
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Knowledge Check

  • In which one of the following pairs the radius of the second species is greater than that of the first?

    A
    `Na , Mg`
    B
    `O^(2-), N^(3-)`
    C
    `Li^(+), Be^(2+)`
    D
    `Ba^(2+), Sr^(2+)`

  • In which one of the following pairs the radius of the second species is greater than that of the first ?

    A
    `O^(-2), N^(-3)`
    B
    Na, Mg
    C
    Al, Be
    D
    `Li^(+), Be^(+2)`

  • In which one of the following pairs the radius of the second species is greater than that of first ?

    A
    `Ti^(4+),Mn^(7+)`
    B
    `Na, Mg`
    C
    `Cl^(-),K^(+)`
    D
    `P^(5+),P^(3+)`
    • R SHARMA-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN ELEMENTS-Level -I
    1. In which one of the following pairs is the radius of the second specie...

      Text Solution

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