Is a "double" ionic bond (the transfer of two electrons) like in MgO any stronger (or really any different, structurally etc.) than a "single" ionic bond (the transfer of one electron) like in NaCl?
Sorry, one more question.No, you can't make a double bond out of single charged ions.
And you can't ionize Na nor Cl further - that is, in some exotic conditions you can, but when you combine them the Na2+ will steal an electron from Cl2- and they will live happily ever after in their local energetic optimum.
Sorry, one more question.
What reaction would occur between Cl2 and a Na-? Would a Cl atom steal an electron from Na, making Cl- + NaCl? Or would the Na- create an ionic bond with both Cl atoms creating a structure similar to MgCl2?