Problem 11SAQ

Determine the formal charge of nitrogen in this structure.

a) +1

b) +2

c) -1

d) -2

Solution 11 SAQ Let’s try to solve for the letter a) Step 1 of 1 The general formula to calculate the formal charge of an atom is Formal charge = number of valence electrons – (number of non-bonding electrons) + ½ number of bonding electrons Nitrogen belongs to the group V A, thus it has 5 valence electrons. In this structure, Nitrogen doesn’t have any non bonding electron (so their number is 0), but it is implied in forming 4 covalent bonds. Every covalent bond participate with 2 electrons, thus we have 8 bonding electrons. Since we have to consider the half of this number 8/2= 4. Thus, if we substitute the numbers for every voice of that formul charge calculation formula indicated above, we have Formal charge = 5 – 0 – 4= +1 The formal charge of nitrogen in that structure is +1. Therefore, the correct option is (a).