* Electronegativity: Electronegativity is the ability of an atom to attract electrons towards itself in a chemical bond. Oxygen has a high electronegativity (3.44) while magnesium has a low electronegativity (1.31).
* Electron Transfer: The large electronegativity difference means that oxygen has a much stronger pull on electrons than magnesium. When they interact, oxygen effectively "steals" two electrons from magnesium.
* Formation of Ions: Magnesium, having lost two electrons, becomes a positively charged ion (Mg²⁺). Oxygen, having gained two electrons, becomes a negatively charged ion (O²⁻).
* Electrostatic Attraction: These oppositely charged ions are then held together by a strong electrostatic attraction, forming the ionic bond that constitutes magnesium oxide (MgO).
In Summary: The significant electronegativity difference between magnesium and oxygen drives the transfer of electrons, leading to the formation of charged ions and the electrostatic attraction that defines an ionic bond.
