what is the electron dot structure of MgO and state the bonding
The correct answer and explanation is:
The electron dot structure of magnesium oxide (MgO) involves the transfer of electrons from magnesium (Mg) to oxygen (O). Here’s the breakdown:
- Magnesium (Mg) is in Group 2 of the periodic table, so it has two valence electrons. In the electron dot structure, these two electrons are represented as dots around the symbol for magnesium.
- Oxygen (O) is in Group 16 and has six valence electrons. In the electron dot structure, these six electrons are shown as dots around the symbol for oxygen.
When magnesium reacts with oxygen to form magnesium oxide (MgO), magnesium donates its two valence electrons to oxygen. This results in the formation of two ions: a magnesium ion (Mg²⁺) and an oxide ion (O²⁻).
- Mg loses two electrons, becoming Mg²⁺, which is represented as [Mg]²⁺.
- O gains two electrons, becoming O²⁻, represented as [O]²⁻.
This electron transfer creates oppositely charged ions, which are held together by strong electrostatic forces known as ionic bonding. The ionic bond is formed because of the attraction between the positively charged magnesium ion (Mg²⁺) and the negatively charged oxide ion (O²⁻).
The electron dot structure of MgO can be depicted as follows:
Mg: •• → [Mg]²⁺
O: •••• + 2e⁻ → [O]²⁻
This shows magnesium donating its two electrons to oxygen, forming two oppositely charged ions. The result is a stable ionic compound, where the electrostatic force of attraction between the ions holds the compound together. This ionic bond in MgO is very strong, contributing to the high melting point and hardness of the compound. MgO also has good electrical conductivity in its molten state but is an insulator in solid form.