PROBLEM 44P

Determine what is wrong with each ionic Lewis structure and write the correct structure.

(a)

(b)

(c)

Solution 44P

Here, we have to determine what is wrong with each ionic Lewis structure and write the correct structure.

(a) :

We know, Na(Sodium) has 1 valence electron and O(Oxygen) has 6 valence electron. But oxygen has valency of 2. Hence, one O atom, need 2 Na atoms. Hence above lewis structure is incomplete. The correct lewis structure is :

(b) :

Mg(Magnesium) has 2 valence electron and O(Oxygen) has 6 valence electron. Oxidation state of Mg is 2+ and O is 2-. Hence, above lewis structure is incorrect. The correct lewis structure is :

(c) :

Li(Lithium) has 1 valence electron and S(Sulfur) has 6 valence electron. But S has oxidation from -2 to +6. Hence, above lewis structure is incorrect. The correct lewis structure is: