plum pudding model
English edit
Etymology edit
The electrons are viewed as negatively-charged "plums" in a positively-charged "pudding".
Proper noun edit
the plum pudding model
- (historical, physics) An obsolete scientific model of the atom, devised shortly after the discovery of the electron but before the discovery of the atomic nucleus, and according to which the atom is composed of electrons surrounded by a soup of positive charge to balance the electrons' negative charges. It was disproved in 1909.