In SF6 sulfur hexafluoride , the central atom is sulfur. To determine the hybridization of the central atom, we need to consider the number of electron domains around it. Sulfur has 6 valence electrons, and each fluorine atom contributes 1 electron, making a total of 12 electrons around the sulfur atom. These 12 electrons form 6 electron domains 6 single bonds with the 6 fluorine atoms . To accommodate 6 electron domains, the central sulfur atom needs to use one s orbital, three p orbitals, and two d orbitals. This leads to sp3d2 hybridization for the central sulfur atom in SF6.