Question

Consider the following species: N 3- , O 2- , F - , Na + , Mg 2+ and Al 3+ Why are they called isoelectronic species?

Answer 1

Atoms and ions that have the same electron configuration are said to be isoelectronic species .Isoelectronic species are elements or ions that have the equal number of electrons.

Example: O ^-2 ,    F^ -1   , Mg ^ +2 have 10 electrons. Hence, they are isoelectronic species.

Examples of isoelectronic species are N3–, O2–, F–, Ne, Na+, Mg2+, and Al3+

( 1s^2   2s^2  2p^6).