Isoelectronic species have the same number of
ions
electrons
protons
neutrons
Correct answer is B
The term "isoelectronic" comes from the Greek words "iso" meaning "equal" and "electron" meaning "electron". Isoelectronic species are atoms, molecules, or ions that have the same number of electrons. have the same number of electrons because they have the same electron configuration. The electron configuration of an atom is the arrangement of electrons in the atom's orbitals. The electron configuration of an atom determines the chemical properties of the atom.