`O^(2-)` is isoelectronic with
`O^(2-)` is isoelectronic with
A. `Zn^(2+)`
B. `Mg^(2+)`
C. `K^(+)`
D. `Ni^(2+)`
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Correct Answer - B
`O^(2-) "is isoelectronic with" Mg^(+2)`
`O^(2-)to8+2=10e^(-)`
`Mg^(+2)to12-2=10e^(-)`
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