Question

(1) Write the electron-dot structures for sodium, oxygen and
magnesium.
Show the formation of Na,o and Mgo by the transfer of electrons.
What are the ions present in these compounds?
Why do ionic compounds have high melting points?​

Answer 1

Answer:

Again for Oxygen (2, 6) = O with two electrons each on three sides. For Magnesium (2, 8, 2) = Mg with two electrons on the top. The formation of Na20 and MGO can be written as Mg2+ + O2 (2-). In Na2O, Na+ and O2- ions are present and in MgO, Mg2= and O2 (2- ) ions are present.

Answer 2

Na2O contains Na+ and O2+ ions. MgO contains Mg2+ and O2- ions.

(i) They are solids having high melting point. (ii) They are soluble in water.

(iii) They conduct electricity in molten state as well as in aqueous solution.

Explanation:

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