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(i) Write the electron-dot structures for sodium, oxygen, and magnesium.

(ii) Show the formation of Na2O and MgO by the transfer of electrons.

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

Metals & Non-Metals

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Answer

(i) Electron-dot structures for sodium, oxygen, and magnesium are shown below:

Write the electron-dot structures for sodium, oxygen, and magnesium. NCERT Class 10 Science CBSE Solutions.

(ii) Formation of Na2O

Na2,8,1⟶Na+2,8+e−\underset{\text{2,8,1}}{\text{Na}} \longrightarrow \underset{\text{2,8}}{\text{Na}^+} + \text{e}^-

O2,6+2e−⟶O2−2,8\underset{\text{2,6}}{\text{O}} + 2\text{e}^- \longrightarrow \underset{\text{2,8}}{\text{O}^{2-}}

Show the formation of Na2O by the transfer of electrons. NCERT Class 10 Science CBSE Solutions.

Formation of MgO

Mg2,8,2⟶Mg2+2,8+2e−\underset{\text{2,8,2}}{\text{Mg}} \longrightarrow \underset{\text{2,8}}{\text{Mg}^{2+}} + 2\text{e}^-

O2,6+2e−⟶O2−2,8\underset{\text{2,6}}{\text{O}} + 2\text{e}^- \longrightarrow \underset{\text{2,8}}{\text{O}^{2-}}

Show the formation of MgO by the transfer of electrons. NCERT Class 10 Science CBSE Solutions.

(iii) Ions present in these compounds are:

CompoundCationAnion
Na2ONa+O2-
MgOMg2+O2-

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