Which of the following could never be isoelectronic species?
A)anions of two different elements
B)cations of two different elements
C)an anion and a cation
D)an anion and an atom
E)atoms of two different elements

Question

Quizplus · Accepted Answer

Isoelectronic species have the same number of electrons. Atoms of two different elements inherently have different numbers of protons and, in their neutral state, different numbers of electrons, making it impossible for them to be isoelectronic without gaining or losing electrons (i.e., becoming ions).

Which of the Following Could Never Be Isoelectronic Species