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Classful

Details

Pages
5 Pages
Subject
Science, Chemistry, Physical Science
Product
Digital
Grade
5th, 6th, 7th, 8th, 9th, 10th, 11th, 12th
Resource Type
Activities, Interactives, Laboratory

Description

Introduction:
Ernest Rutherford's atomic theory describes the atom with a central positive nucleus surrounded by negative orbiting electrons. This model suggested that most of the mass of the atom was contained in the small nucleus, and that the rest of the atom was mostly empty space. Rutherford came to this conclusion following the results of his famous gold foil experiment. This experiment involved the firing of radioactive particles through minutely thin gold metal foils and detecting them using screens coated with zinc sulfide. While most of the alpha particles passed straight through the foil approximately 1 in 8000 were deflected. These data led Rutherford to the conclusion that atoms are made of mostly empty space except for a massive, positively charged center.

In this fun, engaging lab students will observe and compare alpha particle trajectories as they pass through simulations of J. J. Thomson's Plum Pudding Atom and Rutherford's Nuclear Atom. Students will manipulate the number of protons, the number of neutrons, and alpha particle energy levels to discover how atoms are structured. The only materials you will need is the student hand out (provided), internet access, and answer key (provided).
Introduction: Ernest Rutherford's atomic theory describes the atom with a central positive nucleus surrounded by negative orbiting electrons. This model suggested that most of the mass of the atom was contained in the small nucleus, and that the rest of... more
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