Question

1. Magnesium has an electronic configuration of 2.8.2

Answer 1

Answer:

Explanation:

Magnesium and oxygen forms ionic bonds between them. In the formation of an ionic bond, a metal will lose an amount of electron to the non - metal. This way two ions are produced  and the electrostatic attraction between the two ions results in the formation of the ionic bond.

  Magnesium : 2 8 2

  Oxygen : 2 6

For magnesium to be stable and be isoelectronic with neon, it must lose two electrons to form an ion:

          Mg →   Mg²⁺ + 2e⁻  

For oxygen to be stable it must gain two electrons:

     O  + 2e⁻  →  O²⁻  

Mg²⁺ + O²⁻ →  MgO

So the attraction between the ions results in the formation of the MgO.