Chromium (II) solution in a test tube. The purple colour comes from the chromium 2+ ions. Chromium is a transition metal | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Chillmaid, Martyn F. |
Taille de l’image : | 2036 px × 3043 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |