Isoelectronic refers to a group of atoms or ions having the same number of electrons. For example, F-, Ne, and Na+ are isoelectronics.
Generalic, Eni. "Isoelectronic." Croatian-English Chemistry Dictionary & Glossary. 29 June 2022. KTF-Split. {Date of access}. <https://glossary.periodni.com>.
Glossary
Periodic Table