The central atom in CF4 is carbon. The carbon atom in CF4 is sp3 hybridized, which means that it has formed four sp3 hybrid orbitals by mixing one 2s orbital and three 2p orbitals.
The sp3 hybrid orbitals are arranged tetrahedrally, with bond angles of 109.5 degrees between each hybrid orbital. The sp3 hybrid orbitals form bonds with the fluorine atoms, resulting in a tetrahedral molecular geometry for the CF4 molecule.
In summary, the central carbon atom in CF4 is sp3 hybridized, which is indicated by its tetrahedral molecular geometry and the bond angles of 109.5 degrees between each of the sp3 hybrid orbitals and the bonded atoms.