i. Write the electron dot structures for sodium, oxygen, and magnesium.
ii. Show the formation of MgO and Na₂O by the transfer of electrons.
iii. What are the ions present in these compounds?

ii. Formation of Magnesium oxide

When magnesium reacts with oxygen, the magnesium atom transfers its two outermost electrons to an oxygen atom. By losing 2 electrons, the magnesium atoms form a magnesium ion (Mg²⁺) and by gaining 2 electrons, the oxygen atom forms an oxide ion (O_2-).

Formation of Sodium oxide

Two sodium atoms transfer their 2 outermost electrons to an oxygen atom. By losing two electrons, the two sodium atoms form two sodium ions (2Na⁺). And by gaining two electrons, the oxygen atom forms an oxide ion (O_2-.)

iii. The ions present in the sodium oxide compound (Na₂0) are sodium ions (2Na⁺ and oxide ions (O^2-).

The ions present in the Magnesium oxide compound (MgO) are magnesium ions Mg²⁺ and oxide ions (O^2-).

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Updated on: 13-Mar-2023

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