A covalent bond is likely to form between a sulfur atom and a chlorine atom. This is determined by the electronegativity difference between the two atoms. Sulfur S has an electronegativity value of 2.58, and chlorine Cl has an electronegativity value of 3.16. The electronegativity difference between them is 3.16 - 2.58 = 0.58. When the electronegativity difference between two atoms is less than 1.7, they are likely to form a covalent bond. In this case, the difference is 0.58, which indicates that a covalent bond will form between the sulfur and chlorine atoms.