Isoelectronic Question: Oxygen Ion and Isoelectronic Species Comparison

[bobbarkernar]

Homework Statement

which of the following is isoelectronic with the oxygen ion

sulfur ion
chlorine ion
sodium ion
argon

Homework Equations

The Attempt at a Solution

i think the answer is the sulfur ion because it has the same number of valence electrons. is this the correct:::::::::::::

i figured it out it's because they have the same electron configurations
ty

 

[Cesium]

Isoelectronic does not refer to equal number of valence electrons, but rather equal number of electrons (and hence equal electron configurations).

i figured it out it's because they have the same electron configurations

The electron configurations of a sulfur ion and an oxygen ion are not the same.

 

[Blueshift5]

I can confirm that your answer is correct. Isoelectronic species are atoms or ions that have the same number of electrons, and therefore, the same electron configuration. In this case, the oxygen ion has a charge of -2 and has 10 electrons, while the sulfur ion also has 10 electrons and a charge of -2. This makes them isoelectronic. It is important to note that while chlorine ion, sodium ion, and argon all have the same number of electrons as the oxygen ion, they do not have the same electron configuration, making them not isoelectronic. Great job on figuring it out!