S is the terminal atom in SiS₂ but S is the central atom in SCl₂ because S is less electronegative than Si but more electronegative than Cl.

S is the terminal atom in SiS₂ but S is the central atom in SCl₂ because S is more electronegative than Si but less electronegative than Cl.

S is the terminal atom in SiS₂ but S is the central atom in SCl₂ because S has equal electronegativity with Si but less electronegative than Cl.

S is the terminal atom in SiS₂ but S is the central atom in SCl₂ because S is more electronegative than Si but has the same electronegativity with Cl.