Content deleted Content added
No edit summary Tags: Mobile edit Mobile web edit Advanced mobile edit |
No edit summary |
||
Line 6:
Despite Thomson's efforts, his model couldn't account for [[emission spectra]] and [[Valence (chemistry)|valencies]]. Based on experimental studies of [[Rutherford scattering experiments|alpha particle scattering]], [[Ernest Rutherford]] developed an alternative [[Rutherford model|model for the atom]] featuring a compact nucleus where the positive charge is concentrated.
Thomson's model is popularly referred to as the "plum pudding model" with the notion that the electrons are distributed uniformly like raisins in a [[plum pudding]]. Neither Thomson nor his colleagues ever used this analogy.<ref name="HonGoldstein2013">{{Cite journal |
"With regard to positive electrification I have been in the habit of using the crude analogy of a liquid with a certain amount of cohesion, enough to keep it from flying to bits under its own repulsion. I have however always tried to keep the physical conception of the positive electricity in the background because I have always had hopes (not yet realised) of being able to do without positive electrification as a separate entity and to replace it by some property of the corpuscles."<br /></ref>
| |||