(i) Write the electron-dot structures for sodium and oxygen.
(ii) Show the formation of Na2O and MgO by the transfer of electrons.
(iii) What are the ions present in these compounds?
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The electron-dot structure for sodium (Na) is represented as Na•, where the dot represents the valence electron.
The electron-dot structure for oxygen (O) is represented as •O•, where each dot represents a valence electron.
Formation of Na2O and MgO by the transfer of electrons:
Na2O is formed by the transfer of electrons from sodium (Na) to oxygen (O). Each sodium atom donates one electron to oxygen, resulting in the formation of two sodium cations (Na+) and one oxygen anion (O2-). The resulting compound is Na2O.
MgO is formed in a similar manner. Magnesium (Mg) donates two electrons to oxygen, resulting in the formation of one magnesium cation (Mg2+) and one oxygen anion (O2-). The resulting compound is MgO.
Ions present in Na2O and MgO:
In Na2O, the ions present are two sodium cations (Na+) and one oxygen anion (O2-).
In MgO, the ions present are one magnesium cation (Mg2+) and one oxygen anion (O2-).
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