Na and K is one of the isoelectronic species.
Therefore, option C is correct option.
<h3>What is isoelectronic species? </h3>
An isoelectronic species are those species with group of atoms or ions which have same electronic configuration.
For calculating total number of electron, the positive charge is subtracted from the total number of electrons whereas negative charge is added to the total number of electrons.
As we know that sodium and potassium are belong to same group. Every member of a group have same electronic configuration. They have different nuclear charge but have same outer electronic configuration.
It is evident that Na and K have same electronic configuration.
Thus we concluded that the Na and K are isoelectronic species.
learn more about isoelectronic species:
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