Draw electron-dot representation for the formation of Magnesium oxide?

To illustrate the formation of magnesium oxide (MgO) using an electron-dot representation, we need to focus on the valence electrons of magnesium and oxygen.

Valence Electrons of Magnesium and Oxygen

Magnesium (Mg) is in Group 2 of the periodic table and has two valence electrons. Oxygen (O), found in Group 16, has six valence electrons.

Electron-Dot Representation

In the electron-dot diagram, we represent the valence electrons as dots around the chemical symbol:

• Magnesium: Mg has 2 dots: Mg: ••
• Oxygen: O has 6 dots: O: ••••••

Formation of Magnesium Oxide

When magnesium reacts with oxygen, it transfers its two valence electrons to oxygen. This process can be shown as follows:

• Magnesium loses 2 electrons: Mg → Mg²⁺ + 2e⁻
• Oxygen gains 2 electrons: O + 2e⁻ → O²⁻

Final Representation

After the transfer of electrons, the electron-dot representation can be summarized as:

• Magnesium ion: Mg²⁺
• Oxide ion: O²⁻

Thus, magnesium oxide is formed through the ionic bond between Mg²⁺ and O²⁻, resulting in the compound MgO.