Chemistry 9th Edition

Published by Cengage Learning
ISBN 10: 1133611095
ISBN 13: 978-1-13361-109-7

Chapter 2 - Atoms, Molecules, and Ions - Questions: 21

Answer

J.J Thomson: Showed the existence of electrons Ernest Rutherford: Showed that an atom has a positively charged nucleus, where the mass is concentrated. Combined: It led to the idea that an atom has a positively charged mass in the center with negatively charged particles moving around the nucleus at a distance.

Work Step by Step

J.J. Thomson used cathode ray tubes to show that a negatively charged particle (electrons) exist in atoms. Ernest Rutherford conducted the Gold Foil Experiment and concluded that there is a positively charged mass in the center of an atom.
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