1.

(i) Write the electron-dot structures for sodium (11) oxygen (8), chlorine (17) and magnesium (12) show the formation of Na_(2)O and MgO by the transfer of electrons. (ii) Name the ions present in these compounds.

Answer»

Solution :(i) SODIUM (NA) - 2,8,1 `overset(**)(Na)`
Chlorine (Cl) - 2,8,7 `.^(*)overset(..)underset(..)Cl:`
Oxygen (O) - 2,6 `:overset(..)O:`
Magnesium (Mg) - 2,8,2 Mg:
`{:(Mg,RARR,Mg^(2+)+2e^(-),),("2,8,2",,"2,8",),(,,"(Magnesium cation)",),(O+2e^(-),rarr,O^(2-),),("2,6",,"2,8",):}`

`{:(Na,rarr,Na^(+)+e^(-),),("2,8,1",,"2,8",),(O+2e^(-),rarr,O^(2-),),("2,6",,"2,8",):}`

(ii) In MGO, cation - `Mg^(2+)`, Anion - `O^(2)`
In `Na_(2)O`, cation - `Na^(+)`, Anion - `O^(2)`


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