(ii) What are the ions present in these compounds?


Answer (ii) 


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).


(ii) The ions present in sodium oxide compound (Na 2 O) are : Sodium ions ( Na + ) and oxide ions.( O 2- )

Magnesium oxide (MgO) is formed of Mg 2+ and O 2- ions.

  1. Class 10
  2. Chapter 3 Class 10 - Metals and Non-Metals (Term 1)

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CA Maninder Singh
CA Maninder Singh is a Chartered Accountant for the past 11 years and a teacher from the past 11 years. He teaches Science, Accounts and English at Teachoo