Experiments With Sulphur

Pour light yellow sulphur powder into a test tube and heat the tube slowly and carefully with a Bunsen burner. At first, the sulphur discolours a little and melts. Next, it turns brown and becomes solid. If you continue to heat the test tube, the sulphur slowly becomes liquid again, and you can pour it into a beaker filled with water. The drops in the beaker are soft (plastic). It smells of rotten eggs.

Explanation:

The atomic lattice changes during heating, therefore, the colour and the strength of the sulphur change.

Elemental sulphur occurs in sulphides and sulphates.
Volcanic gases often contain sulphur dioxide and hydrogen sulphide. These gases are able to from clouds of sulphur and water vapour.