What is a trajectory What kind of information do you need to predict the trajectory of a

3.10 The Sizes of Atoms (in pm) Shielding • In a many-electronatom, electronsare both attractedto the nucleus and repelledby other electrons. • The cancellingof the nuclear attractiveforceon an electron due to the electron-electron repulsion is calledshielding. Core electrons are the most effectiveat shielding. Effective Nuclear Charge...