Sarthaks Test
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Show the formation of:

(a) MgO

(b) Na2O by the transfer of electrons.

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(a) Magnesium loses two electrons to attain a noble gas configuration, whereas oxygen gains two electrons to completely fill the valence shell. 

Mg → Mg2+ + 2e 

O + 2e– 1→ O2

(b) Sodium loses one electron to have a completely filled valence shell, whereas oxygen gains two electrons to complete the valence shell.

Na → Na+ + e 

O + 2e → O2–

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