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In which of the following pairs the ions...

In which of the following pairs the ions are isoelectronic?

A

`Na^(+),Mg^(2+)`

B

`Al^(3+).O^(-)`

C

`Na^(+),O^(-)`

D

`Na^(3-),Cl^(-)`

Text Solution

Verified by Experts

The correct Answer is:
A
For `Na^(+)=11-1=10e^(-)`
`Mg^(2+)=12-2=10e^(-)`
Thus, they have same number of electorns.
for, ` Al^(3+)=13-3=10e^(-),O^(-)=8+ 1=9e^(-)`
They do not have same number of electrons
For `Na^(+)=10e^(-),O^(2-)=8+2=10e^(-)`
They have same number of electrons.
For `N^(3-)=7+3=10e^(-).Cl^(-)=17+1=18e^(-)`
They do not have same number of electrons
Thus, `Na^(+)` is isolectronic with `Mg^(2+)` and `O^(2-)`
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Knowledge Check

  • In which of the following pairs are the ions isoelectronic ?

    A
    `Mg^(2+),Ar`
    B
    `Na^(+),O^(2-)`
    C
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    D
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  • Which one of the following pair of ions are isoelectronic?

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    B
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    C
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    D
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  • Which of the following pairs of ions are isoelectronic and isostructural ?

    A
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    B
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    C
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    D
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