Atoms or ions with the same number of electrons are known as isoelectronic entities. The number of electrons in isoelectronic species would be the same, but the elements would be different. In other words, isoelectronic species refers to ions and atoms that have the same number of electrons.

Atoms and ions that have the same electron configuration are said to be isoelectronic. Examples of isoelectronic species are N3–, O2–, F–, Ne, Na+, Mg2+, and Al3+ (1s22s22p6). Another isoelectronic series is P3–, S2–, Cl–, Ar, K+, Ca2+, and Sc3+ ([Ne]3s23p6).

In isoelectronic species, there the number of electrons would be equal but the elements would be different. In other words, ions and atoms which are having equal numbers of electrons are called the isoelectronic species. Examples: N3-, Al3+, Mg2+, for N3- the number of electrons would be 10, that is 7 + 3.

Argon (Ar) is an isoelectronic with k+. Potassium originally consists of 19 electron.

Isoelectronic means same electronic configuration as Ar. These are such as sulfide ion (S2− ), chloride ion (Cl− ) and phosphide ion (P3− ).

– For finding the isoelectronic pairs, we can just add the number of electrons of each atom in the species and also the charge of the species (if present). – Then, if the number of electrons are equal in both species, they are said to be isoelectronic pairs.

isoelectronic are those which have same no. of electrons. example-Ne and Na+ and Mg+. all have same no.

Isoelectronic can be defined as 2 molecules or atoms having equal number of valence electrons present in their orbit. Note: Some examples of isoelectronic species are carbon monoxide and nitrogen because they have equal numbers of electrons that both contain 10 valence electrons.

And we can see that the potassium ion, K+, has the same electronic configuration as the chloride ion, Cl-, and the same electronic configuration as an atom of argon, Ar. Therefore, Ar, Cl-, and K+ are said to be isoelectronic species.

Neon has ( Z=10 ) has 8 valence electrons, and a full valence shell. Looking at the Periodic Table, reduction gives the anions, F−,O2−,N3− as isoelectronic species.

The chemical species isoelectronic to Ar are phosphide ion (P3− ), sulfide ion (S2− ), chloride ion (Cl− ),…

The answer is Na2+. This is because Na2+ has 9 electrons whereas Argon has 18 electrons. Therefore Na2+ is not isoelectric with Argon.

For example, the K+ ion is isoelectronic with argon. Potassium has 19 electrons and 1 is in the outermost shell: a valence electron. If potassium is ionized and becomes a +1 cation, this is to say that it lost its single valence electron.

Isoelectronic means that the entities (atoms, ions, molecules) in question have the same electronic structure and same number of valence electrons. For example, the K+ ion is isoelectronic with argon. Potassium has 19 electrons and 1 is in the outermost shell: a valence electron.

Sodium (K) – has a +1 charge because it has lost 1 electron (e-) – making it slightly more positive. Chlorine (Cl) has a -1 charge because it has gained 1 electron, making it slightly more positive. Both of these are considered to be isoelectric to Argon (Ar) because they have the same number of electrons.

An Isoelectronic Series is a group of atoms/ions that have the same number of electrons. Examples. N3-, O2-, F-, Ne, Na+, Mg2+, Al3+. This series each have 10 electrons.