Answer
See work below.
Work Step by Step
Sulfur has several allotropes; The most common naturally occurring allotrope of sulfur is composed of an $S_{8}$ ring structure called cyclooctasulfur. When heated above its melting point of $112^{\circ} C$, cyclooctasulfur forms a straw-yellow liquid with low viscosity. Above $150^{\circ} C$, the rings begin to break, and the sulfur becomes a darker, more viscous liquid as the broken rings entangle one another. The color is darkest at $180^{\circ}C$ when the liquid becomes very viscous and pours very slowly. Above this temperature, however, the intermolecular forces between the $S_{8}$ chains weaken, and the liquid becomes less viscous again.
