Which of the following are isoelectronic species, i.e., those having the same number of electrons ? Na^(+), K^(+), Mg^(2+), Ca^(2+), S^(2-), Ar.

Which of the following are isoelectronic species, i.e., those having t

1.	Which of the following are isoelectronic species, i.e., those having the same number of electrons ? Na^(+), K^(+), Mg^(2+), Ca^(2+), S^(2-), Ar.
Answer» SOLUTION :`{:("No. of electrons are :",Na^(+)=11-1=10",",K^(+)=19-1=18",",Mg^(2+)=12-2=10","),(,CA^(2+)=20-2=18",",S^(2-)=16+2=18",",Ar=18):}` HENCE, isoelectronic species are `Na^(+)` and `Mg^(2+), K^(+), Ca^(2+), S^(2-)` and `Ar`,