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harsha_27 (1353)

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Isoelectronic means molecules or atoms having same no of valence electrons and similar structure( I mean their arrangement).



NCS- has 7 + 6 + 8 + 1 = 22 valence electrons.

CS2 has 6 + 2(8) = 22 valence electrons.

Hence they are isoelectronic.
Correct me if I'm wrong anywhere.




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