Bromide, Chloride and Fluoride
Doubly negatively charged oxide ions, singly negatively charged fluoride ions, and neon atoms are isoelectronic with triply negatively charged nitride ions.
Phosphide is isoelectronic with argon.
Potassium is isoelectronic with the cation K+.
Atoms are isoelectronic when they have the same electron configuration. Therefore, an anion isoelectronic to krypton is bromide. A cation isoelectronic to krypton is rubidium.
Bromide, Chloride and Fluoride
Both fluoride ion and sodium ion are isoelectronic with neon. That means all have 10 electrons.
Doubly negatively charged oxide ions, singly negatively charged fluoride ions, and neon atoms are isoelectronic with triply negatively charged nitride ions.
1s2 2s2 2p6 is the electron configuration of the fluoride ion. It has a complete octet and is isoelectronic with neon. Before it becomes an ion, it is 1s2 2s2 2p5 Then it gains an electron and has a negative charge.
Phosphide is isoelectronic with argon.
Potassium is isoelectronic with the cation K+.
Atoms are isoelectronic when they have the same electron configuration. Therefore, an anion isoelectronic to krypton is bromide. A cation isoelectronic to krypton is rubidium.
O3 is the allotrope of oxygen that is isoelectronic.
argon and S2- are isoelectronic
Neon is isoelectronic with the sodium ion.
The Sulfide ion, S2-, is isoelectronic with Cl-
oxide ion is isoelectronic with neon.