Atomic Timeline Webquest

Susan Chai, Michael Ginevsky, Candy Li, Clara Tsui

 

Bohr’s model portrays an atom with the following structure: a small, positively charged nucleus is in the centre, surrounded by electrons in orbit. Neil Bohr stated that electrons can only exist at a certain, distance from the nucleus, or else it would loose its energy and be sucked into the protons. In the Electron Cloud Model of an atom, electrons are no longer viewed as solid, spherical particles that orbit around the dense nucleus, but as an ‘airy’ structure (similar to that of a cloud) that occupies a region of an atom depending on its energy level. Erwin Schrodinger and Werner Heisenburg later developed the probability functions to stipulate exactly where those regions or clouds would likely be found in the atom.

 

Electron cloud model

Electron Cloud Model