Answer: magnesium and sulfur
Explanation: Ionic compound is formed by the transference of electrons from metal to non metal.
Magnesium is a metal with atomic number of 12.
Electronic configuration of sodium:
[tex][Mg]:12:1s^22s^22p^63s^2[/tex]
Magnesium atom will loose two electrons to gain noble gas configuration and form magnesium cation with +2 charge.
[tex][Mg^{2+}]:10:1s^22s^22p^63s^0[/tex]
Sulphur is a non metal with atomic number of 16.
Electronic configuration of sulfur:
[tex][S]:16:1s^22s^22p^63s^23p^4[/tex]
Sulfur atom will gain two electrons to gain noble gas configuration and form sulphide ion with -2 charge.
[tex][S^{2-}]:18:1s^22s^22p^63s^23p^6[/tex]
In Magnesium sulfide [tex]MgS[/tex], electrons are transferred from magnesium to sulfur.
