Melting sulphur, 4 of 4. A test tube with powdered sulphur, S, is placed over a Bunsen burner flame. When heated, it first melts to a straw-yellow liquid and then darkens to a red-brown colour. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Giphotostock |
Taille de l’image : | 5150 px × 3424 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |