Some ions do not have a corresponding neutral atom that has the same e- config. For each of the followings ions identify the neutral atom that has the same # of e- and determine if this atom has the same e- config. If such an atom does not exist explain why: (a) Cl-, (b) Sc^3+, (c) Fe^2+, (d) Zn^2+, (e) Sn^4+