Which one of the following sets of ions ...

Which one of the following sets of ions represents a collection of isoelectronic species ?

A

`K^(+), Cl^(-), Ca^(2+), Sc^(3+)`

B

`Ba^(2+), Sr^(2+), K^(+), K^(+), S^(2-)`

C

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

D

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

Verified by Experts

The correct Answer is:

A

In case of (A), each ion contains `1.8e^(-)s` .

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