Some potential‐energy relationships for isoelectronic atomic series

Relationships between the total energy E , the nuclear‐electronic attraction energy V ne , and the interelectronic repulsion energy V ee are derived for isoelectronic series of atoms and ions. Using these, it is possible to determine V ne and V ee for the members of such series from a knowledge of just their total energies. The method is applied to the ground and first excited states of the two‐electron series, and the ground states of the three‐ and four‐electron series, and the results are discussed.