Question

Is ${\mathrm{SO}}_3$ Neutral?

Answer 1

1. Sulfur has 6 electrons in its outermost orbital.
2. A covalent link connects three oxygen atoms to the sulfur atom in ${\mathrm{SO}}_3$
3. Sulfur has a +6 charge and one oxygen consists of two negative charges so three oxygen has 6 negative charges.
4. The molecule is neutral on the basis of the electroneutrality principle.

Structure of ${\mathbf{SO}}_{\mathbf{3}}$:

Hence, ${\mathrm{SO}}_3$ is a neutral molecule.