Question

what is the significance of the terms isolated gaseous atom and the ground state while defining the ionization enthalpy and electron gain enthalpy

Answer 1

the significance of isolated term is that it shows that the storm is neutral and term ground state is used to indicate the outermost shell

Answer 2

Answer:

It is useful to compare the ionization enthalpies of the atoms of different elements. Isolated gaseous atom means a single gaseous atom free from other atoms. No energy should be utilize to separate it further from other atoms.