(i) Write the electron-dot structures for sodium, oxygen and magnesium.
(ii) Show the formation of `Na_(2)O` and `M_(g)O` by the transfer of electrons.
(iii) What are the ions present in these compounds?

Explanation

(i) (a) Atomic number (Z) of sodium (Na) : 11.
Electronic distribution : K(2), L(8), M(1)
Electron dot structure : Na
(b) Atomic number (Z) of magnesium (Mg) : 12.
Electronic distribution : K(2), L(8), M(2)
Electron dot structure : Mg
(c ) Atomic number (Z) of oxygen (O) is 8.
Electronic distribution : K(2), L(6)
Electron dot structure : `.underset(.)overset(..)O:`
(ii) Formation of sodium oxide `(Na_(2)O)`

(iii) For answer, consult structures given above.