Gas jar of Hydrogen. Hydrogen is a colourless gas at room temperature. Its chemical symbol is H and is the most abundant chemical in the universe. As a chemical compound,a water molecule contains one oxygen and two hydrogen atoms that are connected by covalent bonds. At a concentration of 4-74%,hydrogen gas forms an explosive mixture with air | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Chillmaid, Martyn F. |
Taille de l’image : | 3686 px × 5529 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |