Question

Formal charge on sulphur in $S{O_2}$ is:

Answer 1

Hint- The formal charge is a theoretical charge doled out from the dot structure. The formal charges in a structure let us know the "quality" of the dot structure. Some act of doling out formal charge is fundamental before you ace this procedure.

Complete answer:
Formal charge is a method for distinguishing the "best" Lewis dot structure when multiple substantial dot structures can be drawn for a molecule or ion. The formal charge can be appointed to each particle in an electron dot structure.
If you can draw various substantial Lewis dot structures for a specific molecule or ion dot structures, at that point together they structure a lot of conceivable reverberation structures. In this way, how can one pick which structure is the most sensible decision – in other words, which is the steadiest? Another instrument for your toolbox is called formal charge. Formal charge is a helpful method to look at the strength for a lot of legitimate Lewis dot structures. In the wake of figuring the formal charge on each atom for every one of the structures in the set, the steadiest structure(s) are dictated by application of the formal charge rules-
• Structures with the most minimal size of formal charges are progressively steady.
• Additional electronegative atoms will have negative formal charges.
• Adjacent atoms ought to have inverse formal charges (or zero formal charge).
S atom has six valence electrons out of which 2 remain as lone pair of electrons and 4 are shared with 2 oxygen atoms to form covalent bonds.
Hence, no electron is gained and no electron is lost. So, neither negative nor positive charge is present on the S atom.

Hence, the formal charge on $S$ atom in $S{O_2}$ is zero.

Note: The formal charge appointed for a specific atom is determined from the quantity of valence electrons the particle would have and the quantity of electrons around the atom when it is bonded in the molecule.