Formal charge $($FC$)$ is the charge assigned to an atom in a molecule, if electrons in all chemical bonds are shared equally between atoms, regardless of relative electronegativities. $FC=$ Valence e$\text{'}$s $-\frac{1}{2}$ Bonded e$\text{'}$s $-$ Unshared e$\text{'}$s$.$ That is: FC $=$ Group # $-$ # Bonds $-$ # Unshared e$\text{'}$s$.$ Define Formal Charge. Identify the formal charges on the bromine, chlorine, nitrogen and phosphorous atoms on each of the following structures.

$H-B^{}r$:$,$:$C^{}1$: $H-C-=N-H$