Answer: KCl
Explanation: Potassium [K] has an atomic no of 19 and the electronic configuration is:
[tex]K :1s^22s^22p^63s^23p^64s^1[/tex] tends to get stable by losing one electron and forming [tex]K^+[/tex]
Chlorine [Cl] has atomic no of 17 and thus the electronic configuration is :
[tex]Cl :1s^22s^22p^63s^23p^5[/tex] tends to get stable by gaining one electron and forming [tex]Cl^-[/tex]
[tex]K^+[/tex] and [tex]Cl^-[/tex] attract each other and form an ionic bond. As we have a chlorine molecule that is two atoms of chlorine are present, 2 atoms of potassium will react to form 2 moles of KCl.
[tex]2K+Cl_2\rightarrow 2KCl[/tex]
