Question

Calculate the formal charge of the central N. Enter the formal charge, including the magnitude and sign. View Available Hint(s) Submit Previous Answers X Incorrect; Try Again; 19 attempts remaining Make sure that you determined the number of valence ele of the element in the periodic table. An element will only he "owns" (all of its nonbonding electrons and one-half of its You may want to review Hint 1. Determine the number of v Part B Calculate the formal charge of the leftmost N. Enter the formal charge, including the magnitude and sign. View Available Hint(s) Consider the following molecule: -N=N-õ:

Answer 1

The formal charge of the central N in the molecule -N=N-õ is 2.5 and the sign is positive.

Step-by-step explanation:

The formal charge of an atom in a molecule can be calculated by subtracting the number of valence electrons of the atom in its isolated state from the sum of nonbonding electrons and one-half of the bonding electrons associated with that atom. For the central N in the molecule -N=N-õ, the valence electron of N is 5. Assuming that the bonding electrons are equally shared, the central N is connected to 3 bonding electrons and has 1 nonbonding electron. Therefore, the formal charge of the central N is calculated as follows:

Formal charge = #valence electrons (neutral atom) - #nonbonding electrons - 1/2(#bonding electrons)

Formal charge = 5 - 1 - 1.5 = 2.5

The magnitude of the formal charge is 2.5 and the sign is positive.