Is Magnesium Oxide (MgO) Ionic or Covalent?
Is Magnesium Oxide (MgO) ionic or covalent?
MgO is an ionic compound with a very high melting point. Magnesium transfers two electrons to oxygen, forming Mg2+ and O2- ions with very strong electrostatic attraction.
| Formula | MgO |
| Name | Magnesium Oxide |
| Bond Type | Ionic |
| EN Values | Mg: 1.31, O: 3.44 |
| EN Difference | 2.13 |
| Electron Behavior | Transfer |
| Melting Point | 2852 C (very high) |
| Conductivity | Conducts when molten |
| Solubility | Slightly soluble in water |
| Key Concept | Doubly-charged ionic bond with extremely high melting point |
Overview
Magnesium oxide is a ceramic material used in heat-resistant applications. The doubly-charged ions create an exceptionally strong ionic bond.
Electronegativity Analysis
Mg has an EN of 1.31, O has 3.44. The difference of 2.13 clearly indicates ionic bonding.
Electron Behavior
Magnesium transfers its two valence electrons to oxygen, forming Mg2+ and O2-. The double charges create stronger attraction than singly-charged ions like Na+Cl-.
Physical Properties
MgO has one of the highest melting points of any ionic compound (2852 C) because the 2+ and 2- charges create very strong electrostatic forces.
See electronegativity values, partial charges, and bond character on interactive 3D molecules.
Visualize Magnesium Oxide's Bonding in 3DRelated Topics
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Interactive Periodic Table
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