Isoelectronic species are atoms or ions that have the same number of electrons. In this case, only neon (Ne) and nitrogen ion (N3-) have the same number of electrons (10 electrons).
- Sodium ion (Na+) has 10 electrons, but it has lost one electron, resulting in a positive charge.
- Magnesium ion (Mg2+) has 12 electrons, but it has lost two electrons, resulting in a 2+ charge.
- Aluminium ion (Al3+) has 13 electrons, but it has lost three electrons, resulting in a 3+ charge.
