And since the orbitals of Na and Cl are at the same place, how should you tell whether an electron belongs to one or the other? "In the neighbourhood of Cl" is also the neighbourhood of the 6 surrounding Na. And then, how to tell whether the bond is polarized?
May be there is some confusion , I said that when two waves interact with each other (overlap with each other) ,they looses their individuality . Same thing happes in the case of NaCl bond , when their electrons overlap with each other , they are no more bound to either Na or Cl , actually They are bound to both of them (As far as I know , I can be wrong , please correct me If I go wrong) .
Then I said my question is quite answerable if we consider the electron probability Density . Of-course It can be measured .
Initially i posted this because my sir told me that Principle of Structure and Reactivity by James E Huheey is one of the most Reliable book in Chemistry .
I was uncertain about the meaning of this paragraph . Is there any deep reasoning behind this ? Which I am not able to understand ??
"We have no absolute proof of the existence of ions in solid Sodium Chloride . For example though our best observation is that ions are found when it is melted or dissolved in water does not prove that they existed in the solid crystal."