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Which of the following ions is not isoel...

Which of the following ions is not isoelectronic with the other three ?

A

`CO_3^(2-)`

B

`NO_3^-`

C

`SO_3^(2-)`

D

`BO_3^(3-)`

Text Solution

Verified by Experts

The correct Answer is:
C
Isoelectronic ions have the same electron configurations and therefore the same number of electrons .The atomic number of B.C.N.O. and S are 5,6,7,8 and 16 respectively. The number of electrons in `SO_3^(2-)` is 42, in other ions, 32.
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Knowledge Check

  • Which is not isoelectronic with the other three

    A
    CO
    B
    `NO^+`
    C
    `CN^-`
    D
    `O_2`

  • Which of the following is not isoelectronic?

    A
    `Na^(+)`
    B
    `Mg^(+)`
    C
    `O^(2-)`
    D
    `Cl^(-)`

  • Which of the following pairs is isoelectronic?

    A
    `Ar and Cl `
    B
    `Na^(+) and N e`
    C
    `Na^(+) and Mg`
    D
    `Mg and N e`

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