license: This image is a derivative work of the following images: File:Helium_atom_QM.svg licensed with GFDL 2007-12-26T11:40:58Z Bromskloss 665x667 (10264...
English The helium atom, the smallest of atoms, has a nucleus (pink) consisting of two protons (red) and two neutrons (purple). The fuzzy cloud is the...
