(i) Write the electron-dot structures for sodium, oxygen and magnesium. Show the formation of Na 2 O and MgO by the transfer of electrons.


Answer (i) 

Electron dot structure for Sodium, oXYGEN AND MAGNESIUM - Teachoo.png

Periodic table Elements 1 to 20 - Teachoo.png

The two sodium atoms lose 1 electron each to form 2 sodium ions (2Na + ).

The oxygen atom forms an oxide ion (O 2- ) by gaining 2 electrons, one from each sodium atom. 

Na and O hence form an ionic compound Sodium Oxide (Na 2 O).

Reactions of metals to form oxides - Teachoo.png

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CA Maninder Singh is a Chartered Accountant for the past 14 years and a teacher from the past 18 years. He teaches Science, Economics, Accounting and English at Teachoo