CST Review_Atoms and Atomic Structure
CST Review_Atoms and Atomic Structure . Each electron shell can only contain a certain number of electrons. The electrons in an atom move around the nucleus in regions known as electron shells. Electron arrangement in atoms differentiated Teaching Resources from www.tes.com Electrons are placed in the lower energy level first and when this is completely filled, we move on to the second energy level and so on. A car of mass 2045 kg moving in the x direction at a speed of 29 m/s strikes a hovering mosquito of mass 2.5 mg, and the mosquito is smashed against the windshield. They have no electrical charge.