Final answer:
The total number of atoms and sets of lone pairs surrounding the central atom in CCl4 is 4.
Step-by-step explanation:
In CCl4, the central atom is carbon (C) and it is surrounded by four chlorine (Cl) atoms. Each chlorine atom forms a single bond with the carbon atom, resulting in a total of four bonds. There are no lone pairs of electrons around the central carbon atom in CCl4. Therefore, the total number of atoms and sets of lone pairs surrounding the central atom is 4.