Chromium. Samples of the transition metal chromium (Cr). Chromium has the atomic number 24 and is a hard,metallic element that can be highly polished. It never occurs by itself in nature but only in compounds. When combined with oxygen it yields chromic oxide which is used as a pigment | |
Licence : | Droits gérés |
Crédit: | Science Photo Library |
Taille de l’image : | 4193 px × 4193 px |
Model Release : | Non requis |
Restrictions : | - |