תשובה אחת
https://docs.google.com/document/d/1wldxuwcbzzrdddz7wnrustvisczmsnnj4nvhenib3x8/edit
http://www.damada.co.il/topics/physics/db/electricity_atom_structure/electricity_atom_structure.shtml
http://www.damada.co.il/topics/physics/db/electricity_atom_structure/electricity_atom_structure.shtml
באותו הנושא: