I believe it would be better to use an orbital designation than the written configuration, if the number of electrons in the ground state of the atom are quite high for the given element, as above 50, for instance.
This saves space and also one can see the discrete quantized energy levels associated with the subshells of the main energy levels if written in orbital designation.
Like in general, or is there something u didn't put?<span />
D
Isotopes have the same number of protons so they both have 17 and a different amount of neutrons which is why the mass number is different
