So, sodium atom will donate one electron to chlorine atom and forms a sodium ion i.e. Na+. On the other side chlorine atomic number is 17, its electronic configuration is 2,8,7.

Image Ionic Bond in Sodium Chloride 2 A sodium and chlorine atom are near each other. An electron from each atom feels the attraction from the other atom's nucleus. The attraction by chlorine is ...

Letter Published: 18 November 1920 The Separation of the Element Chlorine into Normal Chlorine and Meta-Chlorine, and the Positive Electron F. W. ASTON Nature 106, 375 (1920) Cite this article ...