Question

Of the following sets which one does NOT contain isoelectronic species?

Answer 1

(c) : Number of electrons in SO₃^2– = 16 + 8 × 3 + 2 = 42
Number of electrons in CO₃^2– = 6 + 8 × 3 + 2= 32
Number of electrons in NO₃^– = 7 + 8 × 3 + 1= 32
These are not isoelectronic species as number of electrons are not same.