High School Chemistry Graphic Organizers and FoldablesTable of Contents:States of Matter Properties Fill-in ChartTypes of Matter Graphic Organizer (Matter, Pure Substance, Mixtures, Elements, Compounds, Homogeneous Mixture, Heterogeneous Mixture)Separating Mixtures Fill-in Chart (Filtration, Distillation, Crystallization, Chromatography)Atomic Theory Fill-in Timeline (Democritus, Dalton, Thomson, Rutherford, Chadwick)Models of the Atom Graphic Organizer (Atomos, Plum-Pudding model…
Model atom Thomson dikenal sebagai "plum pudding model" atau yang sering kita dengar "model roti kismis". Thomson menyatakan bahwa, atom terdiri dari awan bermuatan positif yang terdistribusi sedemikian rupa dengan muatan negative tersebar secara random di dalamnya.
1911: Ernest Rutherford's gold-foil experiments demonstrate that atoms have a solid nucleus. Top: Expected results: alpha particles passing through the plum pudding model of the atom undisturbed. Bottom: Observed results: a small portion of the particles were deflected, indicating a small, concentrated charge.
This is the Plum Pudding Model. It was developed by JJ Thompson. He proposed this because of the Cathode ray experiments that he completed in the 1890s. These experiments proved the existence of negatively-charged particles associated with electrons. The Plum Pudding Model suggests negatively charged particles embedded in a ball of positive charges.