Determine the group of each atom present in every formula and calculate for the total # of valence electrons to find which is not isoelectronic
Isoelectronic compounds mean that they have the same number of valence electrons.
Recall that the # of valence electron is determined by the Group # of each atom.
Analyzing each compound:
Which of the molecules in the choices given is not isoelectronic with the others? The choices are: SO3, NF3, NO3–, CO32–?
e. all of the above are isoelectronic molecules
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