Question

The ion that is most stable​

Answer 1

Answer:

 Atoms are at their most stable when their outermost energy level is either empty of electrons or filled with electrons. Sodium atoms have 11 electrons. Two of these are in the lowest energy level, eight are in the second energy level and then one electron is in the third energy level.

Answer 2

Answer:

And since cyanide has the highest stability, we can say that $Fe(CN)_{6}]^{3-}$ is the most stable ion.