How do we find out the two species are isoelectronic? We count only valence shell electrons or total number of electrons?

Dear Mohini,

Isoelectornic species are groups of elements/ions which have the same number of(total) electrons.

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Aman Bansal

Askiitian Expert

Iso electronic species means species having same no.of electrons in the atom.

we should count all the electrons present in the atom.

with my best regards.