Problem: Complete the Lewis dot structure for AsO33–.

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FREE Expert Solution

We’re being asked to determine a valid Lewis structure for AsO33-We first need to determine the total number of valence electrons present in the molecule:


            Group                        Valence Electrons

As         5A                   1 × 5 e5 e

O          6A                    3 × 6 e18 e

              Total:  23 valence e


The rules for drawing Lewis structures involving As, and O are as follows:


• As: Prefers to form four (4) bonds

• O: Prefers to form two (2) bonds and 2 lone 

         • O also more electronegative so it will have the negative charges. 


96% (484 ratings)
Problem Details

Complete the Lewis dot structure for AsO33–.

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