The oxide ion in a sample compound half of the lithium ions which is 4.2 × 10²¹ ions.
It is defined as the atom or compound which have net electric charge due to loss or gain of electron.
Ionic bond is defined as the bond which is formed by the transfer of electron from one atom to another atom.
The compound formed by forming ionic bond is termed as Ionic compound.
4Li + O2 --- 2Li2O
From. the reaction we noticed that one oxide ion react with two ions of lithium to form Li2O.
Therefore, the oxide ions in a sample compound should be half of the lithium ions.
Thus, we found that the oxide ions in a sample of ionic compound is 4.2 × 10²¹ ions.
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