Heium,atomic model. Helium has two neutrons (white) and two protons (pink) in its nucleus (centre). The atom also has two electron (blue) orbiting the nucleus | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Saurer, Friedrich |
Taille de l’image : | 4606 px × 4606 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |