The polarity arrow should point AWAY FROM THE CENTRAL SULPHUR ATOM.
Arrows are used for different purposes in chemistry. Polarity arrow is used to indicate the position of polar bonds in organic molecules. Polarity refers to the separation of the electric charges in a substance, so that the substance is partially positive and at the same time it is partially negative.
Atoms of the same elements differing in the number of neutrons in their nuclei are known as isotopes. Thus, isotopes of an element have the same atomic number but different atomic mass number. Isotopes of an element have similar chemical properties but different physical properties.
