Question

what are the ions present in Na2O and MgO.

Answer 1

the ions present in mgo and na2o are mg+2 and o-2

Answer 2

Answer:

Number of ions depends on the valence electron of the atoms.

Explanation:

The ions present in Na2O (Sodium oxide) are sodium ions (2Na+) and oxide ion O2-.

The ions present in MgO (Magnesium oxide) are magnesium ion (Mg 2 +) and oxide ion O2- .

Formation of  Na2O (Sodium oxide) : As Atomic number of sodium is 11 and oxygen is 8.  Electronic configuration of Na is 2, 8, 1 and oxygen is 2, 6. So, Sodium lose one electron (cation) and oxygen combine with two atoms of sodium  (anion) and forms Na2O.

Formation of MgO (Magnesium oxide) : The atomic number of magnesium  is 12 and oxygen is 8. Electronic configuration of Mg is 2, 8, 2 and oxygen is 2, 6. So, Magnesium can lose two atoms from valence shell to get stability and oxygen require two atoms for stability, so oxygen takes two atoms from magnesium, which results into  MgO.

Hence, ions present in Na2O are  sodium ions (2Na+) and oxide ion O2- and in MgO (Magnesium oxide) are magnesium ion (Mg 2 +) and oxide ion O2-

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