Electron
Electron
Thomson's model of atom
It was proposed by J.J. Thomson Positively charged in eighteen ninety-eight. According to this model, the positive charge of atom is uniformly distributed throughout the volume of the atom and the negatively charged electrons are embedded in it like seeds in watermelon.
Distance of closest approach
Distance of closest approach
The minimum distance between center of the nucleus of atom to that point where alpha-particle just deflected back due to repulsion. Kinetic Energy equals Potential Energy.
r equals two times ze squared.