Helium atom. Illustration of the atomic structure and electron configuration of the element helium. An atom of this element has 2 electrons (blue) shown here in orbit round the nucleus (centre). The two electrons are in the first shell (the 1s orbital). The isotope shown here is helium-4, with a nucleus of 2 protons (red) and 2 neutrons (grey). All isotopes of an element have the same electronic structure. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library |
Bildgröße: | 4181 px × 4181 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |